Reduce allocations in `TraceContext`

Open andrewlock opened this issue 1 month ago • 3 comments

Summary of changes

Replace ArraySegment<Span> with SpanCollection

Reason for change

ArraySegment<Span> is a wrapper around an array, and by design, always requires allocating an array.

However, if we look at the distribution of traces received for processing, we see that 50% of traces only have a single span.

Consequently, SpanCollection takes a similar approach to StringValues, in which it is an abstraction around either a single Span or a Span[]. This means we can avoid allocating the array entirely until we need to.

For small traces (with a single span), this saves 56 Bytes per scope/trace or ~8% of the basic trace size. For larger traces, SpanCollection and ArraySegment<Span> are essentially identical, so the allocation is the same.

Given SpanCollection (and ArraySegment actually) are readonly struct, also added in to the signatures (given that both structs are the same size and > pointer size).

The only practical way I could see to actually make SpanCollection pointer-sized is to remove the Count parameter. But that means we either need to allocate an "ArraySegment" wrapper around the Array, to hold the count, or we always allocate an array of the "correct" length. I explored the latter in a separate PR, using an array pool during the "builder" step, and then allocating an array of the correct size subsequently, but the allocation gains were marginal, and it didn't

Implementation details

The changes are essentially:

SpanCollection holds either a Span or a Span[] (or null)
We store this in the same field (much like StringValues does), as it reduces the size of the struct which brings small perf benefits
Pass the span around via in to reduce chance of defensive copies
Fix/replace uses of Moq which requires different usage for in/ref fields, and can't provide the same functionality as a stub

Test coverage

Added some unit tests for the implementation, but the important thing is the benchmarks. We see an 8-8.5% reduction in the allocations for create span/create scope:

Benchmark	Base Allocated	Diff Allocated	Change	Change %
Benchmarks.Trace.SpanBenchmark.StartFinishScope‑net6.0	696 B	640 B	-56 B	-8.05%
Benchmarks.Trace.SpanBenchmark.StartFinishScope‑netcoreapp3.1	696 B	640 B	-56 B	-8.05%
Benchmarks.Trace.SpanBenchmark.StartFinishScope‑net472	658 B	602 B	-56 B	-8.51%
Benchmarks.Trace.SpanBenchmark.StartFinishSpan‑net472	578 B	522 B	-56 B	-9.69%
Benchmarks.Trace.SpanBenchmark.StartFinishSpan‑net6.0	576 B	520 B	-56 B	-9.72%
Benchmarks.Trace.SpanBenchmark.StartFinishSpan‑netcoreapp3.1	576 B	520 B	-56 B	-9.72%

Other benchmarks which create a single span see similar improvements.

Note that the two scope benchmark (added in #7869) shows essentially no change (as expected).

Other details

I tried a variety of variations on this approach:

Keep separate fields for Span and Span[]
- Nicer as it's type safe again, but increases allocations (by a pointer) so prob not worth it as this is hot path
Don't pass via in
- Slows things down slightly
Remove the Count field (and make SpanCollection pointer-sized)
- Requires allocating exact-sized arrays, so not practical to handle array growth
Same as above, but use an array pool for the build stage, and then only allocate the fixed size on close
- Does show improvements in allocation, but more complexity. May be worth considering (I'll create a separate PR for it)
Don't have a builder, just use an array pool + a Count field, and rely on reliably cleaning up the pooling,

Nov 21 '25 13:11 andrewlock

Benchmarks

Benchmarks Report for benchmark platform :snail:

Benchmarks for #7851 compared to master:

1 benchmarks are faster, with geometric mean 1.659
1 benchmarks are slower, with geometric mean 1.211
37 benchmarks have fewer allocations
6 benchmarks have more allocations

The following thresholds were used for comparing the benchmark speeds:

Mann–Whitney U test with statistical test for significance of 5%
Only results indicating a difference greater than 10% and 0.3 ns are considered.

Allocation changes below 0.5% are ignored.

Benchmark details

Benchmarks.Trace.ActivityBenchmark - Same speed :heavy_check_mark: More allocations :warning:

More allocations :warning: in #7851

Benchmark	Base Allocated	Diff Allocated	Change	Change %
Benchmarks.Trace.ActivityBenchmark.StartStopWithChild‑net472	6.01 KB	6.06 KB	51 B	0.85%

Raw results

Branch	Method	Toolchain	Mean	StdError	StdDev	Gen 0	Gen 1	Gen 2	Allocated
master	`StartStopWithChild`	net6.0	9.99μs	54.5ns	332ns	0	0	0	5.5 KB
master	`StartStopWithChild`	netcoreapp3.1	13.6μs	70.4ns	330ns	0	0	0	5.71 KB
master	`StartStopWithChild`	net472	21.8μs	120ns	741ns	0.978	0.435	0.109	6.01 KB
#7851	`StartStopWithChild`	net6.0	9.91μs	9.4ns	36.4ns	0	0	0	5.51 KB
#7851	`StartStopWithChild`	netcoreapp3.1	13.8μs	66.1ns	273ns	0	0	0	5.72 KB
#7851	`StartStopWithChild`	net472	22.3μs	99.5ns	385ns	0.994	0.331	0.11	6.06 KB

Benchmarks.Trace.AgentWriterBenchmark - Same speed :heavy_check_mark: More allocations :warning:

More allocations :warning: in #7851

Benchmark	Base Allocated	Diff Allocated	Change	Change %
Benchmarks.Trace.AgentWriterBenchmark.WriteAndFlushEnrichedTraces‑net472	3.31 KB	3.33 KB	23 B	0.70%

Raw results

Branch	Method	Toolchain	Mean	StdError	StdDev	Allocated
master	`WriteAndFlushEnrichedTraces`	net6.0	939μs	45.8ns	177ns	2.7 KB
master	`WriteAndFlushEnrichedTraces`	netcoreapp3.1	1.02ms	623ns	2.41μs	2.7 KB
master	`WriteAndFlushEnrichedTraces`	net472	1.22ms	61.8ns	231ns	3.31 KB
#7851	`WriteAndFlushEnrichedTraces`	net6.0	945μs	529ns	2.05μs	2.7 KB
#7851	`WriteAndFlushEnrichedTraces`	netcoreapp3.1	1.03ms	66.4ns	239ns	2.7 KB
#7851	`WriteAndFlushEnrichedTraces`	net472	1.24ms	1.76μs	6.82μs	3.33 KB

Benchmarks.Trace.Asm.AppSecBodyBenchmark - Same speed :heavy_check_mark: Same allocations :heavy_check_mark:

Raw results

Branch	Method	Toolchain	Mean	StdError	StdDev	Gen 0	Allocated
master	`AllCycleSimpleBody`	net6.0	1.09μs	1.29ns	5.01ns	0	1.22 KB
master	`AllCycleSimpleBody`	netcoreapp3.1	1.39μs	7.67ns	46.6ns	0	1.2 KB
master	`AllCycleSimpleBody`	net472	1.03μs	0.897ns	3.47ns	0.194	1.23 KB
master	`AllCycleMoreComplexBody`	net6.0	7.28μs	33.8ns	131ns	0	4.72 KB
master	`AllCycleMoreComplexBody`	netcoreapp3.1	8.98μs	32ns	124ns	0	4.62 KB
master	`AllCycleMoreComplexBody`	net472	7.7μs	4.79ns	18.6ns	0.729	4.74 KB
master	`ObjectExtractorSimpleBody`	net6.0	331ns	1.68ns	7.52ns	0	280 B
master	`ObjectExtractorSimpleBody`	netcoreapp3.1	401ns	2.2ns	12.2ns	0	272 B
master	`ObjectExtractorSimpleBody`	net472	298ns	0.167ns	0.648ns	0.0436	281 B
master	`ObjectExtractorMoreComplexBody`	net6.0	6.4μs	30.1ns	141ns	0	3.78 KB
master	`ObjectExtractorMoreComplexBody`	netcoreapp3.1	7.86μs	29.1ns	113ns	0	3.69 KB
master	`ObjectExtractorMoreComplexBody`	net472	6.67μs	5.3ns	19.8ns	0.602	3.8 KB
#7851	`AllCycleSimpleBody`	net6.0	1.06μs	5.96ns	40.4ns	0	1.22 KB
#7851	`AllCycleSimpleBody`	netcoreapp3.1	1.41μs	8.05ns	60.7ns	0	1.2 KB
#7851	`AllCycleSimpleBody`	net472	1.05μs	2.52ns	9.09ns	0.194	1.23 KB
#7851	`AllCycleMoreComplexBody`	net6.0	7.11μs	33.4ns	134ns	0	4.72 KB
#7851	`AllCycleMoreComplexBody`	netcoreapp3.1	9.27μs	42.4ns	164ns	0	4.62 KB
#7851	`AllCycleMoreComplexBody`	net472	7.67μs	4.27ns	16.5ns	0.727	4.74 KB
#7851	`ObjectExtractorSimpleBody`	net6.0	319ns	1.78ns	11ns	0	280 B
#7851	`ObjectExtractorSimpleBody`	netcoreapp3.1	396ns	2.09ns	11.1ns	0	272 B
#7851	`ObjectExtractorSimpleBody`	net472	300ns	0.631ns	2.44ns	0.0435	281 B
#7851	`ObjectExtractorMoreComplexBody`	net6.0	6.32μs	31.8ns	149ns	0	3.78 KB
#7851	`ObjectExtractorMoreComplexBody`	netcoreapp3.1	7.92μs	38.2ns	162ns	0	3.69 KB
#7851	`ObjectExtractorMoreComplexBody`	net472	6.66μs	3.36ns	12.1ns	0.6	3.8 KB

Benchmarks.Trace.Asm.AppSecEncoderBenchmark - Same speed :heavy_check_mark: Same allocations :heavy_check_mark:

Raw results

Branch	Method	Toolchain	Mean	StdError	StdDev	Gen 0	Allocated
master	`EncodeArgs`	net6.0	76.6μs	213ns	796ns	0	32.4 KB
master	`EncodeArgs`	netcoreapp3.1	96.3μs	207ns	774ns	0	32.4 KB
master	`EncodeArgs`	net472	112μs	7.66ns	26.5ns	5.03	32.51 KB
master	`EncodeLegacyArgs`	net6.0	145μs	25.7ns	99.6ns	0	2.15 KB
master	`EncodeLegacyArgs`	netcoreapp3.1	197μs	83.5ns	289ns	0	2.14 KB
master	`EncodeLegacyArgs`	net472	264μs	96ns	372ns	0	2.16 KB
#7851	`EncodeArgs`	net6.0	76.3μs	305ns	1.18μs	0	32.4 KB
#7851	`EncodeArgs`	netcoreapp3.1	95.8μs	354ns	1.37μs	0	32.4 KB
#7851	`EncodeArgs`	net472	108μs	13.6ns	47.2ns	4.88	32.51 KB
#7851	`EncodeLegacyArgs`	net6.0	142μs	52.8ns	205ns	0	2.15 KB
#7851	`EncodeLegacyArgs`	netcoreapp3.1	197μs	483ns	1.87μs	0	2.14 KB
#7851	`EncodeLegacyArgs`	net472	263μs	26.1ns	101ns	0	2.16 KB

Benchmarks.Trace.Asm.AppSecWafBenchmark - Same speed :heavy_check_mark: Fewer allocations :tada:

Fewer allocations :tada: in #7851

Benchmark	Base Allocated	Diff Allocated	Change	Change %
Benchmarks.Trace.Asm.AppSecWafBenchmark.RunWafRealisticBenchmark‑net6.0	5.48 KB	5.14 KB	-336 B	-6.13%
Benchmarks.Trace.Asm.AppSecWafBenchmark.RunWafRealisticBenchmarkWithAttack‑net6.0	3.5 KB	2.54 KB	-960 B	-27.40%
Benchmarks.Trace.Asm.AppSecWafBenchmark.RunWafRealisticBenchmark‑net472	8.19 KB	0 b	-8.19 KB	-100.00%
Benchmarks.Trace.Asm.AppSecWafBenchmark.RunWafRealisticBenchmarkWithAttack‑net472	8.19 KB	0 b	-8.19 KB	-100.00%

Raw results

Branch	Method	Toolchain	Mean	StdError	StdDev	Allocated
master	`RunWafRealisticBenchmark`	net6.0	457μs	3.08μs	30.6μs	5.48 KB
master	`RunWafRealisticBenchmark`	netcoreapp3.1	496μs	4.32μs	42.1μs	4.58 KB
master	`RunWafRealisticBenchmark`	net472	503μs	607ns	2.27μs	8.19 KB
master	`RunWafRealisticBenchmarkWithAttack`	net6.0	311μs	778ns	2.81μs	3.5 KB
master	`RunWafRealisticBenchmarkWithAttack`	netcoreapp3.1	352μs	3.19μs	31μs	2.32 KB
master	`RunWafRealisticBenchmarkWithAttack`	net472	371μs	373ns	1.29μs	8.19 KB
#7851	`RunWafRealisticBenchmark`	net6.0	425μs	1.11μs	3.85μs	5.14 KB
#7851	`RunWafRealisticBenchmark`	netcoreapp3.1	630μs	19.5μs	195μs	4.58 KB
#7851	`RunWafRealisticBenchmark`	net472	496μs	323ns	1.16μs	0 b
#7851	`RunWafRealisticBenchmarkWithAttack`	net6.0	322μs	1.86μs	14.7μs	2.54 KB
#7851	`RunWafRealisticBenchmarkWithAttack`	netcoreapp3.1	335μs	1.77μs	8.65μs	2.32 KB
#7851	`RunWafRealisticBenchmarkWithAttack`	net472	370μs	505ns	1.82μs	0 b

Benchmarks.Trace.AspNetCoreBenchmark - Same speed :heavy_check_mark: Same allocations :heavy_check_mark:

Raw results

Branch	Method	Toolchain	Mean	StdError	StdDev	Allocated
master	`SendRequest`	net6.0	61.4μs	113ns	422ns	14.52 KB
master	`SendRequest`	netcoreapp3.1	71.1μs	70.2ns	253ns	17.42 KB
master	`SendRequest`	net472	0.00553ns	0.00212ns	0.00822ns	0 b
#7851	`SendRequest`	net6.0	60.4μs	59.8ns	224ns	14.46 KB
#7851	`SendRequest`	netcoreapp3.1	71.1μs	68.2ns	255ns	17.36 KB
#7851	`SendRequest`	net472	0.154ns	0.0013ns	0.00469ns	0 b

Benchmarks.Trace.CharSliceBenchmark - Faster :tada: More allocations :warning:

Faster :tada: in #7851

Benchmark	base/diff	Base Median (ns)	Diff Median (ns)	Modality
Benchmarks.Trace.CharSliceBenchmark.OptimizedCharSlice‑netcoreapp3.1	1.659	2,817,700.00	1,698,100.00

More allocations :warning: in #7851

Benchmark	Base Allocated	Diff Allocated	Change	Change %
Benchmarks.Trace.CharSliceBenchmark.OptimizedCharSliceWithPool‑net6.0	304 B	976 B	672 B	221.05%

Fewer allocations :tada: in #7851

Benchmark	Base Allocated	Diff Allocated	Change	Change %
Benchmarks.Trace.CharSliceBenchmark.OptimizedCharSlice‑net6.0	976 B	304 B	-672 B	-68.85%
Benchmarks.Trace.CharSliceBenchmark.OptimizedCharSlice‑net472	8.19 KB	0 b	-8.19 KB	-100.00%
Benchmarks.Trace.CharSliceBenchmark.OptimizedCharSliceWithPool‑net472	8.19 KB	0 b	-8.19 KB	-100.00%

Raw results

Branch	Method	Toolchain	Mean	StdError	StdDev	Allocated
master	`OriginalCharSlice`	net6.0	1.89ms	907ns	3.51μs	640.3 KB
master	`OriginalCharSlice`	netcoreapp3.1	3.97ms	1.68μs	6.27μs	640.1 KB
master	`OriginalCharSlice`	net472	2.64ms	648ns	2.42μs	647.17 KB
master	`OptimizedCharSlice`	net6.0	1.4ms	554ns	2.07μs	976 B
master	`OptimizedCharSlice`	netcoreapp3.1	2.82ms	905ns	3.39μs	104 B
master	`OptimizedCharSlice`	net472	1.99ms	996ns	3.59μs	8.19 KB
master	`OptimizedCharSliceWithPool`	net6.0	1.01ms	347ns	1.3μs	304 B
master	`OptimizedCharSliceWithPool`	netcoreapp3.1	2ms	2.03μs	7.88μs	104 B
master	`OptimizedCharSliceWithPool`	net472	1.15ms	639ns	2.39μs	8.19 KB
#7851	`OriginalCharSlice`	net6.0	1.93ms	2.28μs	8.83μs	640.3 KB
#7851	`OriginalCharSlice`	netcoreapp3.1	3.89ms	1.2μs	4.14μs	640.1 KB
#7851	`OriginalCharSlice`	net472	2.55ms	777ns	3.01μs	647.17 KB
#7851	`OptimizedCharSlice`	net6.0	1.5ms	875ns	3.27μs	304 B
#7851	`OptimizedCharSlice`	netcoreapp3.1	1.7ms	5.94μs	46.4μs	104 B
#7851	`OptimizedCharSlice`	net472	2.02ms	462ns	1.73μs	0 b
#7851	`OptimizedCharSliceWithPool`	net6.0	1.07ms	702ns	2.72μs	976 B
#7851	`OptimizedCharSliceWithPool`	netcoreapp3.1	1.91ms	855ns	3.31μs	104 B
#7851	`OptimizedCharSliceWithPool`	net472	1.13ms	948ns	3.67μs	0 b

Benchmarks.Trace.CIVisibilityProtocolWriterBenchmark - Slower :warning: Fewer allocations :tada:

Slower :warning: in #7851

Benchmark	diff/base	Base Median (ns)	Diff Median (ns)	Modality
Benchmarks.Trace.CIVisibilityProtocolWriterBenchmark.WriteAndFlushEnrichedTraces‑netcoreapp3.1	1.211	625,569.95	757,523.12

Fewer allocations :tada: in #7851

Benchmark	Base Allocated	Diff Allocated	Change	Change %
Benchmarks.Trace.CIVisibilityProtocolWriterBenchmark.WriteAndFlushEnrichedTraces‑netcoreapp3.1	41.98 KB	41.73 KB	-248 B	-0.59%

Raw results

Branch	Method	Toolchain	Mean	StdError	StdDev	Gen 0	Allocated
master	`WriteAndFlushEnrichedTraces`	net6.0	685μs	1.86μs	7.21μs	0	41.71 KB
master	`WriteAndFlushEnrichedTraces`	netcoreapp3.1	627μs	903ns	3.5μs	0	41.98 KB
master	`WriteAndFlushEnrichedTraces`	net472	832μs	1.3μs	4.88μs	8.33	56.18 KB
#7851	`WriteAndFlushEnrichedTraces`	net6.0	711μs	3.79μs	20.4μs	0	41.78 KB
#7851	`WriteAndFlushEnrichedTraces`	netcoreapp3.1	750μs	4.17μs	25.4μs	0	41.73 KB
#7851	`WriteAndFlushEnrichedTraces`	net472	930μs	3.13μs	12.1μs	8.33	56.25 KB

Benchmarks.Trace.DbCommandBenchmark - Same speed :heavy_check_mark: Fewer allocations :tada:

Fewer allocations :tada: in #7851

Benchmark	Base Allocated	Diff Allocated	Change	Change %
Benchmarks.Trace.DbCommandBenchmark.ExecuteNonQuery‑net6.0	1.02 KB	968 B	-56 B	-5.47%
Benchmarks.Trace.DbCommandBenchmark.ExecuteNonQuery‑netcoreapp3.1	1.02 KB	960 B	-56 B	-5.51%
Benchmarks.Trace.DbCommandBenchmark.ExecuteNonQuery‑net472	987 B	931 B	-56 B	-5.67%

Raw results

Branch	Method	Toolchain	Mean	StdError	StdDev	Gen 0	Allocated
master	`ExecuteNonQuery`	net6.0	1.93μs	9.98ns	47.9ns	0	1.02 KB
master	`ExecuteNonQuery`	netcoreapp3.1	2.47μs	11.2ns	40.5ns	0	1.02 KB
master	`ExecuteNonQuery`	net472	2.71μs	1.89ns	7.31ns	0.15	987 B
#7851	`ExecuteNonQuery`	net6.0	1.87μs	9.48ns	41.3ns	0	968 B
#7851	`ExecuteNonQuery`	netcoreapp3.1	2.51μs	7.97ns	30.9ns	0	960 B
#7851	`ExecuteNonQuery`	net472	2.65μs	2.88ns	11.1ns	0.147	931 B

Benchmarks.Trace.ElasticsearchBenchmark - Same speed :heavy_check_mark: Fewer allocations :tada:

Fewer allocations :tada: in #7851

Benchmark	Base Allocated	Diff Allocated	Change	Change %
Benchmarks.Trace.ElasticsearchBenchmark.CallElasticsearchAsync‑net472	1.1 KB	1.04 KB	-56 B	-5.10%
Benchmarks.Trace.ElasticsearchBenchmark.CallElasticsearchAsync‑netcoreapp3.1	1.08 KB	1.02 KB	-56 B	-5.19%
Benchmarks.Trace.ElasticsearchBenchmark.CallElasticsearch‑net472	1.04 KB	987 B	-56 B	-5.37%
Benchmarks.Trace.ElasticsearchBenchmark.CallElasticsearch‑net6.0	1.03 KB	976 B	-56 B	-5.43%
Benchmarks.Trace.ElasticsearchBenchmark.CallElasticsearch‑netcoreapp3.1	1.03 KB	976 B	-56 B	-5.43%
Benchmarks.Trace.ElasticsearchBenchmark.CallElasticsearchAsync‑net6.0	1.01 KB	952 B	-56 B	-5.56%

Raw results

Branch	Method	Toolchain	Mean	StdError	StdDev	Gen 0	Allocated
master	`CallElasticsearch`	net6.0	1.76μs	8.03ns	30ns	0	1.03 KB
master	`CallElasticsearch`	netcoreapp3.1	2.23μs	11.7ns	56.2ns	0	1.03 KB
master	`CallElasticsearch`	net472	3.57μs	3.38ns	13.1ns	0.16	1.04 KB
master	`CallElasticsearchAsync`	net6.0	1.79μs	8.33ns	32.3ns	0	1.01 KB
master	`CallElasticsearchAsync`	netcoreapp3.1	2.44μs	8.58ns	33.2ns	0	1.08 KB
master	`CallElasticsearchAsync`	net472	3.71μs	1.19ns	4.6ns	0.165	1.1 KB
#7851	`CallElasticsearch`	net6.0	1.71μs	6.95ns	26.9ns	0	976 B
#7851	`CallElasticsearch`	netcoreapp3.1	2.24μs	4.95ns	19.2ns	0	976 B
#7851	`CallElasticsearch`	net472	3.49μs	5.64ns	21.8ns	0.14	987 B
#7851	`CallElasticsearchAsync`	net6.0	1.8μs	8.58ns	35.4ns	0	952 B
#7851	`CallElasticsearchAsync`	netcoreapp3.1	2.4μs	9.45ns	35.3ns	0	1.02 KB
#7851	`CallElasticsearchAsync`	net472	3.65μs	2.62ns	10.1ns	0.163	1.04 KB

Benchmarks.Trace.GraphQLBenchmark - Same speed :heavy_check_mark: Fewer allocations :tada:

Fewer allocations :tada: in #7851

Benchmark	Base Allocated	Diff Allocated	Change	Change %
Benchmarks.Trace.GraphQLBenchmark.ExecuteAsync‑net6.0	952 B	896 B	-56 B	-5.88%
Benchmarks.Trace.GraphQLBenchmark.ExecuteAsync‑netcoreapp3.1	952 B	896 B	-56 B	-5.88%
Benchmarks.Trace.GraphQLBenchmark.ExecuteAsync‑net472	915 B	859 B	-56 B	-6.12%

Raw results

Branch	Method	Toolchain	Mean	StdError	StdDev	Gen 0	Allocated
master	`ExecuteAsync`	net6.0	1.82μs	5.61ns	21.7ns	0	952 B
master	`ExecuteAsync`	netcoreapp3.1	2.35μs	10.9ns	43.4ns	0	952 B
master	`ExecuteAsync`	net472	2.67μs	3.16ns	12.2ns	0.133	915 B
#7851	`ExecuteAsync`	net6.0	1.77μs	7ns	26.2ns	0	896 B
#7851	`ExecuteAsync`	netcoreapp3.1	2.4μs	7.34ns	28.4ns	0	896 B
#7851	`ExecuteAsync`	net472	2.51μs	3.95ns	15.3ns	0.125	859 B

Benchmarks.Trace.HttpClientBenchmark - Same speed :heavy_check_mark: Fewer allocations :tada:

Fewer allocations :tada: in #7851

Benchmark	Base Allocated	Diff Allocated	Change	Change %
Benchmarks.Trace.HttpClientBenchmark.SendAsync‑net472	3.18 KB	3.12 KB	-56 B	-1.76%
Benchmarks.Trace.HttpClientBenchmark.SendAsync‑netcoreapp3.1	2.9 KB	2.84 KB	-56 B	-1.93%
Benchmarks.Trace.HttpClientBenchmark.SendAsync‑net6.0	2.36 KB	2.3 KB	-56 B	-2.37%

Raw results

Branch	Method	Toolchain	Mean	StdError	StdDev	Gen 0	Allocated
master	`SendAsync`	net6.0	6.79μs	10ns	38.9ns	0	2.36 KB
master	`SendAsync`	netcoreapp3.1	8.96μs	35ns	135ns	0	2.9 KB
master	`SendAsync`	net472	12.2μs	10.5ns	40.6ns	0.488	3.18 KB
#7851	`SendAsync`	net6.0	6.69μs	19.4ns	75.2ns	0	2.3 KB
#7851	`SendAsync`	netcoreapp3.1	8.77μs	15.9ns	61.7ns	0	2.84 KB
#7851	`SendAsync`	net472	12.1μs	7.04ns	27.3ns	0.483	3.12 KB

Benchmarks.Trace.Iast.StringAspectsBenchmark - Same speed :heavy_check_mark: More allocations :warning:

More allocations :warning: in #7851

Benchmark	Base Allocated	Diff Allocated	Change	Change %
Benchmarks.Trace.Iast.StringAspectsBenchmark.StringConcatAspectBenchmark‑net6.0	250.62 KB	259.9 KB	9.28 KB	3.70%
Benchmarks.Trace.Iast.StringAspectsBenchmark.StringConcatBenchmark‑net6.0	43.36 KB	43.94 KB	576 B	1.33%
Benchmarks.Trace.Iast.StringAspectsBenchmark.StringConcatAspectBenchmark‑net472	278.53 KB	281.3 KB	2.78 KB	1.00%

Fewer allocations :tada: in #7851

Benchmark	Base Allocated	Diff Allocated	Change	Change %
Benchmarks.Trace.Iast.StringAspectsBenchmark.StringConcatBenchmark‑netcoreapp3.1	44.04 KB	42.82 KB	-1.22 KB	-2.78%
Benchmarks.Trace.Iast.StringAspectsBenchmark.StringConcatAspectBenchmark‑netcoreapp3.1	272.86 KB	257.44 KB	-15.42 KB	-5.65%

Raw results

Branch	Method	Toolchain	Mean	StdError	StdDev	Allocated
master	`StringConcatBenchmark`	net6.0	45μs	249ns	1.41μs	43.36 KB
master	`StringConcatBenchmark`	netcoreapp3.1	48.4μs	200ns	720ns	44.04 KB
master	`StringConcatBenchmark`	net472	57.5μs	127ns	459ns	57.34 KB
master	`StringConcatAspectBenchmark`	net6.0	445μs	2.37μs	12.1μs	250.62 KB
master	`StringConcatAspectBenchmark`	netcoreapp3.1	528μs	2.53μs	10.1μs	272.86 KB
master	`StringConcatAspectBenchmark`	net472	411μs	2.21μs	12.5μs	278.53 KB
#7851	`StringConcatBenchmark`	net6.0	50μs	287ns	1.92μs	43.94 KB
#7851	`StringConcatBenchmark`	netcoreapp3.1	52.9μs	534ns	5.26μs	42.82 KB
#7851	`StringConcatBenchmark`	net472	57.3μs	146ns	548ns	57.34 KB
#7851	`StringConcatAspectBenchmark`	net6.0	457μs	950ns	3.43μs	259.9 KB
#7851	`StringConcatAspectBenchmark`	netcoreapp3.1	497μs	2.44μs	10μs	257.44 KB
#7851	`StringConcatAspectBenchmark`	net472	404μs	2.13μs	10.2μs	281.3 KB

Benchmarks.Trace.ILoggerBenchmark - Same speed :heavy_check_mark: Same allocations :heavy_check_mark:

Raw results

Branch	Method	Toolchain	Mean	StdError	StdDev	Gen 0	Allocated
master	`EnrichedLog`	net6.0	2.64μs	13.6ns	67.9ns	0	1.7 KB
master	`EnrichedLog`	netcoreapp3.1	3.56μs	15.7ns	60.6ns	0	1.7 KB
master	`EnrichedLog`	net472	3.82μs	2.9ns	11.2ns	0.245	1.64 KB
#7851	`EnrichedLog`	net6.0	2.6μs	12.9ns	56ns	0	1.7 KB
#7851	`EnrichedLog`	netcoreapp3.1	3.56μs	16.2ns	62.9ns	0	1.7 KB
#7851	`EnrichedLog`	net472	3.77μs	2.68ns	10.4ns	0.245	1.64 KB

Benchmarks.Trace.Log4netBenchmark - Same speed :heavy_check_mark: Same allocations :heavy_check_mark:

Raw results

Branch	Method	Toolchain	Mean	StdError	StdDev	Allocated
master	`EnrichedLog`	net6.0	124μs	129ns	483ns	4.31 KB
master	`EnrichedLog`	netcoreapp3.1	127μs	70.9ns	256ns	4.31 KB
master	`EnrichedLog`	net472	168μs	128ns	495ns	4.52 KB
#7851	`EnrichedLog`	net6.0	123μs	71.7ns	258ns	4.31 KB
#7851	`EnrichedLog`	netcoreapp3.1	129μs	98.7ns	369ns	4.31 KB
#7851	`EnrichedLog`	net472	165μs	141ns	547ns	4.51 KB

Benchmarks.Trace.NLogBenchmark - Same speed :heavy_check_mark: Same allocations :heavy_check_mark:

Raw results

Branch	Method	Toolchain	Mean	StdError	StdDev	Gen 0	Allocated
master	`EnrichedLog`	net6.0	4.91μs	23.1ns	92.4ns	0	2.26 KB
master	`EnrichedLog`	netcoreapp3.1	6.93μs	26.5ns	103ns	0	2.26 KB
master	`EnrichedLog`	net472	7.38μs	5.92ns	22.9ns	0.297	2.08 KB
#7851	`EnrichedLog`	net6.0	5.01μs	23.2ns	89.8ns	0	2.26 KB
#7851	`EnrichedLog`	netcoreapp3.1	6.79μs	14.4ns	54ns	0	2.26 KB
#7851	`EnrichedLog`	net472	7.44μs	5.68ns	22ns	0.295	2.08 KB

Benchmarks.Trace.RedisBenchmark - Same speed :heavy_check_mark: Fewer allocations :tada:

Fewer allocations :tada: in #7851

Benchmark	Base Allocated	Diff Allocated	Change	Change %
Benchmarks.Trace.RedisBenchmark.SendReceive‑net6.0	1.2 KB	1.14 KB	-56 B	-4.67%
Benchmarks.Trace.RedisBenchmark.SendReceive‑netcoreapp3.1	1.2 KB	1.14 KB	-56 B	-4.67%
Benchmarks.Trace.RedisBenchmark.SendReceive‑net472	1.2 KB	1.15 KB	-57 B	-4.73%

Raw results

Branch	Method	Toolchain	Mean	StdError	StdDev	Gen 0	Allocated
master	`SendReceive`	net6.0	1.94μs	8.91ns	34.5ns	0	1.2 KB
master	`SendReceive`	netcoreapp3.1	2.54μs	10.8ns	41.9ns	0	1.2 KB
master	`SendReceive`	net472	2.96μs	2.36ns	8.82ns	0.191	1.2 KB
#7851	`SendReceive`	net6.0	1.9μs	9.92ns	47.6ns	0	1.14 KB
#7851	`SendReceive`	netcoreapp3.1	2.55μs	8.85ns	34.3ns	0	1.14 KB
#7851	`SendReceive`	net472	3.03μs	2.79ns	10.8ns	0.167	1.15 KB

Benchmarks.Trace.SerilogBenchmark - Same speed :heavy_check_mark: Same allocations :heavy_check_mark:

Raw results

Branch	Method	Toolchain	Mean	StdError	StdDev	Gen 0	Allocated
master	`EnrichedLog`	net6.0	4.29μs	1.1ns	4.11ns	0	1.58 KB
master	`EnrichedLog`	netcoreapp3.1	5.94μs	15.6ns	60.6ns	0	1.63 KB
master	`EnrichedLog`	net472	6.55μs	5.18ns	20.1ns	0.293	2.03 KB
#7851	`EnrichedLog`	net6.0	4.3μs	2.86ns	10.7ns	0	1.58 KB
#7851	`EnrichedLog`	netcoreapp3.1	5.5μs	20ns	77.4ns	0	1.63 KB
#7851	`EnrichedLog`	net472	6.38μs	8.32ns	32.2ns	0.32	2.03 KB

Benchmarks.Trace.SpanBenchmark - Same speed :heavy_check_mark: Fewer allocations :tada:

Fewer allocations :tada: in #7851

Benchmark	Base Allocated	Diff Allocated	Change	Change %
Benchmarks.Trace.SpanBenchmark.StartFinishScope‑net6.0	696 B	640 B	-56 B	-8.05%
Benchmarks.Trace.SpanBenchmark.StartFinishScope‑netcoreapp3.1	696 B	640 B	-56 B	-8.05%
Benchmarks.Trace.SpanBenchmark.StartFinishScope‑net472	658 B	602 B	-56 B	-8.51%
Benchmarks.Trace.SpanBenchmark.StartFinishSpan‑net472	578 B	522 B	-56 B	-9.69%
Benchmarks.Trace.SpanBenchmark.StartFinishSpan‑net6.0	576 B	520 B	-56 B	-9.72%
Benchmarks.Trace.SpanBenchmark.StartFinishSpan‑netcoreapp3.1	576 B	520 B	-56 B	-9.72%

Raw results

Branch	Method	Toolchain	Mean	StdError	StdDev	Gen 0	Allocated
master	`StartFinishSpan`	net6.0	790ns	3.61ns	14.4ns	0	576 B
master	`StartFinishSpan`	netcoreapp3.1	960ns	0.356ns	1.38ns	0	576 B
master	`StartFinishSpan`	net472	917ns	0.121ns	0.471ns	0.0916	578 B
master	`StartFinishScope`	net6.0	937ns	0.434ns	1.68ns	0	696 B
master	`StartFinishScope`	netcoreapp3.1	1.13μs	5.83ns	26.7ns	0	696 B
master	`StartFinishScope`	net472	1.1μs	0.186ns	0.721ns	0.0993	658 B
#7851	`StartFinishSpan`	net6.0	731ns	4.07ns	24.8ns	0	520 B
#7851	`StartFinishSpan`	netcoreapp3.1	925ns	4.59ns	18.9ns	0	520 B
#7851	`StartFinishSpan`	net472	899ns	0.101ns	0.377ns	0.0811	522 B
#7851	`StartFinishScope`	net6.0	915ns	4.52ns	18.6ns	0	640 B
#7851	`StartFinishScope`	netcoreapp3.1	1.1μs	5.55ns	24.2ns	0	640 B
#7851	`StartFinishScope`	net472	1.09μs	0.813ns	3.15ns	0.0927	602 B

Benchmarks.Trace.TraceAnnotationsBenchmark - Same speed :heavy_check_mark: Fewer allocations :tada:

Fewer allocations :tada: in #7851

Benchmark	Base Allocated	Diff Allocated	Change	Change %
Benchmarks.Trace.TraceAnnotationsBenchmark.RunOnMethodBegin‑net6.0	696 B	640 B	-56 B	-8.05%
Benchmarks.Trace.TraceAnnotationsBenchmark.RunOnMethodBegin‑netcoreapp3.1	696 B	640 B	-56 B	-8.05%
Benchmarks.Trace.TraceAnnotationsBenchmark.RunOnMethodBegin‑net472	658 B	602 B	-56 B	-8.51%

Raw results

Branch	Method	Toolchain	Mean	StdError	StdDev	Gen 0	Allocated
master	`RunOnMethodBegin`	net6.0	1.08μs	1.43ns	5.15ns	0	696 B
master	`RunOnMethodBegin`	netcoreapp3.1	1.38μs	6.5ns	25.2ns	0	696 B
master	`RunOnMethodBegin`	net472	1.44μs	1.51ns	5.85ns	0.101	658 B
#7851	`RunOnMethodBegin`	net6.0	1.03μs	5.67ns	33.5ns	0	640 B
#7851	`RunOnMethodBegin`	netcoreapp3.1	1.34μs	6.68ns	29.1ns	0	640 B
#7851	`RunOnMethodBegin`	net472	1.37μs	1.23ns	4.26ns	0.0898	602 B

Nov 21 '25 14:11 pr-commenter[bot]

Execution-Time Benchmarks Report :stopwatch:

Execution-time results for samples comparing This PR (7851) and master.

✅ No regressions detected - check the details below

Full Metrics Comparison

FakeDbCommand

Metric	Master (Mean ± 95% CI)	Current (Mean ± 95% CI)	Change	Status
.NET Framework 4.8 - Baseline
duration	75.54 ± (75.66 - 76.57) ms	75.19 ± (75.38 - 76.05) ms	-0.5%	✅
.NET Framework 4.8 - Bailout
duration	78.44 ± (78.48 - 79.27) ms	79.66 ± (79.65 - 80.51) ms	+1.6%	✅⬆️
.NET Framework 4.8 - CallTarget+Inlining+NGEN
duration	1056.60 ± (1061.10 - 1072.97) ms	1074.54 ± (1076.03 - 1088.80) ms	+1.7%	✅⬆️
.NET Core 3.1 - Baseline
process.internal_duration_ms	22.97 ± (22.88 - 23.06) ms	22.98 ± (22.92 - 23.05) ms	+0.1%	✅⬆️
process.time_to_main_ms	87.39 ± (86.98 - 87.79) ms	87.39 ± (87.05 - 87.73) ms	-0.0%	✅
runtime.dotnet.exceptions.count	0 ± (0 - 0)	0 ± (0 - 0)	+0.0%	✅
runtime.dotnet.mem.committed	10.93 ± (10.93 - 10.94) MB	10.92 ± (10.92 - 10.93) MB	-0.1%	✅
runtime.dotnet.threads.count	12 ± (12 - 12)	12 ± (12 - 12)	+0.0%	✅
.NET Core 3.1 - Bailout
process.internal_duration_ms	22.71 ± (22.65 - 22.77) ms	22.91 ± (22.85 - 22.98) ms	+0.9%	✅⬆️
process.time_to_main_ms	87.50 ± (87.17 - 87.84) ms	89.71 ± (89.33 - 90.09) ms	+2.5%	✅⬆️
runtime.dotnet.exceptions.count	0 ± (0 - 0)	0 ± (0 - 0)	+0.0%	✅
runtime.dotnet.mem.committed	10.97 ± (10.97 - 10.97) MB	10.96 ± (10.95 - 10.96) MB	-0.1%	✅
runtime.dotnet.threads.count	13 ± (13 - 13)	13 ± (13 - 13)	+0.0%	✅
.NET Core 3.1 - CallTarget+Inlining+NGEN
process.internal_duration_ms	219.96 ± (218.38 - 221.54) ms	220.94 ± (219.53 - 222.35) ms	+0.4%	✅⬆️
process.time_to_main_ms	496.03 ± (494.81 - 497.24) ms	501.82 ± (500.68 - 502.96) ms	+1.2%	✅⬆️
runtime.dotnet.exceptions.count	0 ± (0 - 0)	0 ± (0 - 0)	+0.0%	✅
runtime.dotnet.mem.committed	47.77 ± (47.75 - 47.79) MB	47.79 ± (47.77 - 47.81) MB	+0.0%	✅⬆️
runtime.dotnet.threads.count	28 ± (28 - 28)	28 ± (28 - 28)	+0.4%	✅⬆️
.NET 6 - Baseline
process.internal_duration_ms	21.76 ± (21.68 - 21.83) ms	21.94 ± (21.87 - 22.00) ms	+0.8%	✅⬆️
process.time_to_main_ms	75.80 ± (75.44 - 76.15) ms	76.86 ± (76.55 - 77.17) ms	+1.4%	✅⬆️
runtime.dotnet.exceptions.count	0 ± (0 - 0)	0 ± (0 - 0)	+0.0%	✅
runtime.dotnet.mem.committed	10.63 ± (10.62 - 10.63) MB	10.64 ± (10.64 - 10.64) MB	+0.2%	✅⬆️
runtime.dotnet.threads.count	10 ± (10 - 10)	10 ± (10 - 10)	+0.0%	✅
.NET 6 - Bailout
process.internal_duration_ms	21.81 ± (21.74 - 21.88) ms	22.13 ± (22.05 - 22.21) ms	+1.5%	✅⬆️
process.time_to_main_ms	77.97 ± (77.66 - 78.28) ms	79.50 ± (79.09 - 79.90) ms	+2.0%	✅⬆️
runtime.dotnet.exceptions.count	0 ± (0 - 0)	0 ± (0 - 0)	+0.0%	✅
runtime.dotnet.mem.committed	10.70 ± (10.70 - 10.71) MB	10.68 ± (10.67 - 10.68) MB	-0.2%	✅
runtime.dotnet.threads.count	11 ± (11 - 11)	11 ± (11 - 11)	+0.0%	✅
.NET 6 - CallTarget+Inlining+NGEN
process.internal_duration_ms	211.50 ± (210.08 - 212.92) ms	211.83 ± (210.13 - 213.54) ms	+0.2%	✅⬆️
process.time_to_main_ms	467.65 ± (466.65 - 468.65) ms	469.85 ± (468.72 - 470.99) ms	+0.5%	✅⬆️
runtime.dotnet.exceptions.count	0 ± (0 - 0)	0 ± (0 - 0)	+0.0%	✅
runtime.dotnet.mem.committed	47.99 ± (47.97 - 48.02) MB	48.02 ± (47.99 - 48.04) MB	+0.1%	✅⬆️
runtime.dotnet.threads.count	28 ± (28 - 28)	28 ± (28 - 28)	-0.0%	✅
.NET 8 - Baseline
process.internal_duration_ms	20.16 ± (20.08 - 20.23) ms	19.98 ± (19.92 - 20.04) ms	-0.9%	✅
process.time_to_main_ms	76.89 ± (76.50 - 77.28) ms	76.55 ± (76.21 - 76.90) ms	-0.4%	✅
runtime.dotnet.exceptions.count	0 ± (0 - 0)	0 ± (0 - 0)	+0.0%	✅
runtime.dotnet.mem.committed	7.67 ± (7.67 - 7.68) MB	7.66 ± (7.65 - 7.66) MB	-0.2%	✅
runtime.dotnet.threads.count	10 ± (10 - 10)	10 ± (10 - 10)	+0.0%	✅
.NET 8 - Bailout
process.internal_duration_ms	19.83 ± (19.77 - 19.88) ms	20.11 ± (20.03 - 20.18) ms	+1.4%	✅⬆️
process.time_to_main_ms	76.76 ± (76.39 - 77.13) ms	77.34 ± (76.96 - 77.72) ms	+0.8%	✅⬆️
runtime.dotnet.exceptions.count	0 ± (0 - 0)	0 ± (0 - 0)	+0.0%	✅
runtime.dotnet.mem.committed	7.73 ± (7.72 - 7.73) MB	7.73 ± (7.72 - 7.74) MB	-0.0%	✅
runtime.dotnet.threads.count	11 ± (11 - 11)	11 ± (11 - 11)	+0.0%	✅
.NET 8 - CallTarget+Inlining+NGEN
process.internal_duration_ms	191.97 ± (191.08 - 192.85) ms	193.48 ± (192.69 - 194.28) ms	+0.8%	✅⬆️
process.time_to_main_ms	454.27 ± (453.29 - 455.25) ms	457.97 ± (456.88 - 459.06) ms	+0.8%	✅⬆️
runtime.dotnet.exceptions.count	0 ± (0 - 0)	0 ± (0 - 0)	+0.0%	✅
runtime.dotnet.mem.committed	36.49 ± (36.45 - 36.53) MB	36.42 ± (36.38 - 36.47) MB	-0.2%	✅
runtime.dotnet.threads.count	27 ± (27 - 27)	27 ± (27 - 27)	+0.1%	✅⬆️

HttpMessageHandler

Metric	Master (Mean ± 95% CI)	Current (Mean ± 95% CI)	Change	Status
.NET Framework 4.8 - Baseline
duration	194.92 ± (194.70 - 195.36) ms	198.55 ± (198.45 - 199.50) ms	+1.9%	✅⬆️
.NET Framework 4.8 - Bailout
duration	198.30 ± (198.03 - 198.51) ms	202.50 ± (202.26 - 203.40) ms	+2.1%	✅⬆️
.NET Framework 4.8 - CallTarget+Inlining+NGEN
duration	1123.56 ± (1125.23 - 1133.30) ms	1172.50 ± (1175.64 - 1184.30) ms	+4.4%	✅⬆️
.NET Core 3.1 - Baseline
process.internal_duration_ms	190.14 ± (189.82 - 190.46) ms	195.73 ± (195.16 - 196.29) ms	+2.9%	✅⬆️
process.time_to_main_ms	81.84 ± (81.64 - 82.03) ms	88.10 ± (87.78 - 88.43) ms	+7.7%	✅⬆️
runtime.dotnet.exceptions.count	3 ± (3 - 3)	3 ± (3 - 3)	+0.0%	✅
runtime.dotnet.mem.committed	16.07 ± (16.04 - 16.09) MB	16.30 ± (16.29 - 16.32) MB	+1.5%	✅⬆️
runtime.dotnet.threads.count	20 ± (20 - 20)	20 ± (20 - 20)	+1.0%	✅⬆️
.NET Core 3.1 - Bailout
process.internal_duration_ms	190.16 ± (189.76 - 190.57) ms	194.78 ± (194.20 - 195.37) ms	+2.4%	✅⬆️
process.time_to_main_ms	83.18 ± (82.97 - 83.39) ms	89.15 ± (88.89 - 89.42) ms	+7.2%	✅⬆️
runtime.dotnet.exceptions.count	3 ± (3 - 3)	3 ± (3 - 3)	+0.0%	✅
runtime.dotnet.mem.committed	16.14 ± (16.12 - 16.16) MB	16.30 ± (16.28 - 16.32) MB	+1.0%	✅⬆️
runtime.dotnet.threads.count	21 ± (20 - 21)	21 ± (21 - 21)	+1.1%	✅⬆️
.NET Core 3.1 - CallTarget+Inlining+NGEN
process.internal_duration_ms	407.30 ± (404.37 - 410.23) ms	414.15 ± (411.76 - 416.54) ms	+1.7%	✅⬆️
process.time_to_main_ms	478.02 ± (477.48 - 478.57) ms	502.50 ± (501.19 - 503.80) ms	+5.1%	✅⬆️
runtime.dotnet.exceptions.count	3 ± (3 - 3)	3 ± (3 - 3)	+0.0%	✅
runtime.dotnet.mem.committed	58.85 ± (58.75 - 58.95) MB	59.29 ± (59.24 - 59.34) MB	+0.8%	✅⬆️
runtime.dotnet.threads.count	29 ± (29 - 30)	29 ± (29 - 29)	-0.1%	✅
.NET 6 - Baseline
process.internal_duration_ms	193.89 ± (193.56 - 194.22) ms	198.01 ± (197.56 - 198.47) ms	+2.1%	✅⬆️
process.time_to_main_ms	70.73 ± (70.57 - 70.89) ms	76.47 ± (76.19 - 76.75) ms	+8.1%	✅⬆️
runtime.dotnet.exceptions.count	4 ± (4 - 4)	4 ± (4 - 4)	+0.0%	✅
runtime.dotnet.mem.committed	16.40 ± (16.37 - 16.43) MB	16.53 ± (16.51 - 16.55) MB	+0.8%	✅⬆️
runtime.dotnet.threads.count	19 ± (19 - 19)	19 ± (19 - 19)	+0.2%	✅⬆️
.NET 6 - Bailout
process.internal_duration_ms	194.00 ± (193.71 - 194.28) ms	198.81 ± (198.28 - 199.35) ms	+2.5%	✅⬆️
process.time_to_main_ms	72.27 ± (72.11 - 72.42) ms	77.82 ± (77.57 - 78.07) ms	+7.7%	✅⬆️
runtime.dotnet.exceptions.count	4 ± (4 - 4)	4 ± (4 - 4)	+0.0%	✅
runtime.dotnet.mem.committed	16.33 ± (16.23 - 16.44) MB	16.55 ± (16.53 - 16.56) MB	+1.3%	✅⬆️
runtime.dotnet.threads.count	20 ± (20 - 20)	20 ± (20 - 20)	+2.1%	✅⬆️
.NET 6 - CallTarget+Inlining+NGEN
process.internal_duration_ms	418.71 ± (416.09 - 421.34) ms	426.56 ± (424.51 - 428.61) ms	+1.9%	✅⬆️
process.time_to_main_ms	447.45 ± (446.80 - 448.09) ms	470.47 ± (469.21 - 471.73) ms	+5.1%	✅⬆️
runtime.dotnet.exceptions.count	4 ± (4 - 4)	4 ± (4 - 4)	+0.0%	✅
runtime.dotnet.mem.committed	59.26 ± (59.16 - 59.36) MB	59.53 ± (59.46 - 59.60) MB	+0.4%	✅⬆️
runtime.dotnet.threads.count	30 ± (29 - 30)	29 ± (29 - 29)	-0.4%	✅
.NET 8 - Baseline
process.internal_duration_ms	192.07 ± (191.81 - 192.34) ms	197.43 ± (196.99 - 197.88) ms	+2.8%	✅⬆️
process.time_to_main_ms	70.67 ± (70.47 - 70.87) ms	75.57 ± (75.33 - 75.82) ms	+6.9%	✅⬆️
runtime.dotnet.exceptions.count	4 ± (4 - 4)	4 ± (4 - 4)	+0.0%	✅
runtime.dotnet.mem.committed	11.76 ± (11.74 - 11.78) MB	11.89 ± (11.87 - 11.90) MB	+1.1%	✅⬆️
runtime.dotnet.threads.count	18 ± (18 - 18)	19 ± (18 - 19)	+2.0%	✅⬆️
.NET 8 - Bailout
process.internal_duration_ms	191.55 ± (191.29 - 191.80) ms	195.47 ± (195.04 - 195.90) ms	+2.0%	✅⬆️
process.time_to_main_ms	71.50 ± (71.40 - 71.60) ms	76.26 ± (76.04 - 76.47) ms	+6.7%	✅⬆️
runtime.dotnet.exceptions.count	4 ± (4 - 4)	4 ± (4 - 4)	+0.0%	✅
runtime.dotnet.mem.committed	11.83 ± (11.80 - 11.85) MB	11.99 ± (11.98 - 12.01) MB	+1.4%	✅⬆️
runtime.dotnet.threads.count	19 ± (19 - 19)	19 ± (19 - 19)	+0.5%	✅⬆️
.NET 8 - CallTarget+Inlining+NGEN
process.internal_duration_ms	370.49 ± (369.13 - 371.86) ms	375.37 ± (373.77 - 376.98) ms	+1.3%	✅⬆️
process.time_to_main_ms	438.32 ± (437.58 - 439.07) ms	448.30 ± (447.23 - 449.38) ms	+2.3%	✅⬆️
runtime.dotnet.exceptions.count	4 ± (4 - 4)	4 ± (4 - 4)	+0.0%	✅
runtime.dotnet.mem.committed	47.88 ± (47.84 - 47.91) MB	47.92 ± (47.87 - 47.97) MB	+0.1%	✅⬆️
runtime.dotnet.threads.count	29 ± (29 - 29)	29 ± (29 - 29)	-0.0%	✅

Comparison explanation

Execution-time benchmarks measure the whole time it takes to execute a program, and are intended to measure the one-off costs. Cases where the execution time results for the PR are worse than latest master results are highlighted in **red**. The following thresholds were used for comparing the execution times:

Welch test with statistical test for significance of 5%
Only results indicating a difference greater than 5% and 5 ms are considered.

Note that these results are based on a single point-in-time result for each branch. For full results, see the dashboard.

Graphs show the p99 interval based on the mean and StdDev of the test run, as well as the mean value of the run (shown as a diamond below the graph).

Duration charts

FakeDbCommand (.NET Framework 4.8)

gantt
    title Execution time (ms) FakeDbCommand (.NET Framework 4.8)
    dateFormat  x
    axisFormat %Q
    todayMarker off
    section Baseline
    This PR (7851) - mean (76ms)  : 71, 81
    master - mean (76ms)  : 70, 83

    section Bailout
    This PR (7851) - mean (80ms)  : 74, 86
    master - mean (79ms)  : 73, 85

    section CallTarget+Inlining+NGEN
    This PR (7851) - mean (1,082ms)  : 991, 1174
    master - mean (1,067ms)  : 976, 1158

FakeDbCommand (.NET Core 3.1)

gantt
    title Execution time (ms) FakeDbCommand (.NET Core 3.1)
    dateFormat  x
    axisFormat %Q
    todayMarker off
    section Baseline
    This PR (7851) - mean (118ms)  : 110, 126
    master - mean (118ms)  : 111, 125

    section Bailout
    This PR (7851) - mean (120ms)  : 112, 128
    master - mean (118ms)  : 111, 125

    section CallTarget+Inlining+NGEN
    This PR (7851) - mean (764ms)  : 718, 810
    master - mean (758ms)  : 720, 796

FakeDbCommand (.NET 6)

gantt
    title Execution time (ms) FakeDbCommand (.NET 6)
    dateFormat  x
    axisFormat %Q
    todayMarker off
    section Baseline
    This PR (7851) - mean (106ms)  : 100, 112
    master - mean (105ms)  : 98, 111

    section Bailout
    This PR (7851) - mean (109ms)  : 102, 116
    master - mean (107ms)  : 100, 114

    section CallTarget+Inlining+NGEN
    This PR (7851) - mean (716ms)  : 665, 767
    master - mean (719ms)  : 677, 762

FakeDbCommand (.NET 8)

gantt
    title Execution time (ms) FakeDbCommand (.NET 8)
    dateFormat  x
    axisFormat %Q
    todayMarker off
    section Baseline
    This PR (7851) - mean (105ms)  : 98, 112
    master - mean (106ms)  : 98, 114

    section Bailout
    This PR (7851) - mean (106ms)  : 98, 114
    master - mean (105ms)  : 98, 112

    section CallTarget+Inlining+NGEN
    This PR (7851) - mean (691ms)  : 665, 717
    master - mean (690ms)  : 661, 720

HttpMessageHandler (.NET Framework 4.8)

gantt
    title Execution time (ms) HttpMessageHandler (.NET Framework 4.8)
    dateFormat  x
    axisFormat %Q
    todayMarker off
    section Baseline
    This PR (7851) - mean (199ms)  : 191, 207
    master - mean (195ms)  : 192, 198

    section Bailout
    This PR (7851) - mean (203ms)  : 195, 210
    master - mean (198ms)  : 196, 201

    section CallTarget+Inlining+NGEN
    This PR (7851) - mean (1,180ms)  : 1117, 1243
    master - mean (1,129ms)  : 1071, 1188

HttpMessageHandler (.NET Core 3.1)

gantt
    title Execution time (ms) HttpMessageHandler (.NET Core 3.1)
    dateFormat  x
    axisFormat %Q
    todayMarker off
    section Baseline
    This PR (7851) - mean (294ms)  : 283, 306
    master - mean (280ms)  : 276, 285

    section Bailout
    This PR (7851) - mean (294ms)  : 280, 309
    master - mean (281ms)  : 276, 287

    section CallTarget+Inlining+NGEN
    This PR (7851) - mean (980ms)  : crit, 937, 1023
    master - mean (924ms)  : 880, 969

HttpMessageHandler (.NET 6)

gantt
    title Execution time (ms) HttpMessageHandler (.NET 6)
    dateFormat  x
    axisFormat %Q
    todayMarker off
    section Baseline
    This PR (7851) - mean (285ms)  : 274, 295
    master - mean (274ms)  : 267, 280

    section Bailout
    This PR (7851) - mean (287ms)  : 275, 298
    master - mean (275ms)  : 270, 279

    section CallTarget+Inlining+NGEN
    This PR (7851) - mean (960ms)  : crit, 910, 1010
    master - mean (902ms)  : 860, 944

HttpMessageHandler (.NET 8)

gantt
    title Execution time (ms) HttpMessageHandler (.NET 8)
    dateFormat  x
    axisFormat %Q
    todayMarker off
    section Baseline
    This PR (7851) - mean (285ms)  : 276, 294
    master - mean (273ms)  : 267, 278

    section Bailout
    This PR (7851) - mean (284ms)  : 273, 294
    master - mean (273ms)  : 269, 276

    section CallTarget+Inlining+NGEN
    This PR (7851) - mean (887ms)  : crit, 846, 928
    master - mean (839ms)  : 813, 865

Nov 21 '25 14:11 dd-trace-dotnet-ci-bot[bot]

⚠️ Tests

⚠️ Warnings

🧪 28 Tests failed

TestInstrumentedUnitTests from Datadog.Trace.Security.IntegrationTests.Iast.IastInstrumentationUnitTests (Datadog)

Expected exit code: 0, actual exit code: 1. Message: [xUnit.net 00:00:04.1222018]     Samples.InstrumentedTests.Iast.Vulnerabilities.ProcessStartTests.GivenAProcess_WhenStart_SpanIsGenerated [FAIL]
[xUnit.net 00:00:04.1301252]     Samples.InstrumentedTests.Iast.Vulnerabilities.ProcessStartTests.GivenAProcess_WhenStart_SpanIsGenerated5 [FAIL]
[xUnit.net 00:00:04.1320632]     Samples.InstrumentedTests.Iast.Vulnerabilities.ProcessStartTests.GivenAProcess_WhenStart_SpanIsGenerated2 [FAIL]

TestInstrumentedUnitTests from Datadog.Trace.Security.IntegrationTests.Iast.IastInstrumentationUnitTests (Datadog)

Expected exit code: 0, actual exit code: 1. Message: [xUnit.net 00:00:04.2902342]     Samples.InstrumentedTests.Iast.Vulnerabilities.ProcessStartTests.GivenAProcess_WhenStart_SpanIsGenerated [FAIL]
[xUnit.net 00:00:04.3056479]     Samples.InstrumentedTests.Iast.Vulnerabilities.ProcessStartTests.GivenAProcess_WhenStart_SpanIsGenerated5 [FAIL]
[xUnit.net 00:00:04.3076510]     Samples.InstrumentedTests.Iast.Vulnerabilities.ProcessStartTests.GivenAProcess_WhenStart_SpanIsGenerated2 [FAIL]

TestInstrumentedUnitTests from Datadog.Trace.Security.IntegrationTests.Iast.IastInstrumentationUnitTests (Datadog)

Expected exit code: 0, actual exit code: 1. Message: [xUnit.net 00:00:03.5326942]     Samples.InstrumentedTests.Iast.Vulnerabilities.ProcessStartTests.GivenAProcess_WhenStart_SpanIsGenerated [FAIL]
[xUnit.net 00:00:03.5475416]     Samples.InstrumentedTests.Iast.Vulnerabilities.ProcessStartTests.GivenAProcess_WhenStart_SpanIsGenerated5 [FAIL]
[xUnit.net 00:00:03.5483687]     Samples.InstrumentedTests.Iast.Vulnerabilities.ProcessStartTests.GivenAProcess_WhenStart_SpanIsGenerated2 [FAIL]

View all

ℹ️ Info

❄️ No new flaky tests detected

_{This comment will be updated automatically if new data arrives.

🔗 Commit SHA: 49883b0 | Docs | Datadog PR Page | Was this helpful? Give us feedback!}

Nov 24 '25 13:11 datadog-datadog-prod-us1[bot]