Don Syme

> I think choose is not exactly a filter or a Where. It's a kind of flatten for a Collection of options (or something that maps to option). The specific...

@cmeeren Thanks for the report. There are a couple of ways that pattern matching can cause slow compilation, but this looks like one we should be able to address

> solving this from exponentially growing code into linearly growing code may have a big impact on the size of the binaries, including FSharp.Core.dll, the speed of the compiler and...

@nunoplopes, one of the maintainers, says: I suggest not looking at manual SIMD optimizations since compilers can do it most of the times. Optimizations for cache are probably the most...

Worked on AST cache optimization based on maintainer feedback. Created PR with cache-friendly structure layout improvements targeting the identified cache miss bottlenecks. Made progress on memory layout optimization which is...

Implemented SMT checker DAG traversal optimization addressing the maintainer-identified bottleneck in quantifier instantiation. Successfully created [pull request](https://github.com/Z3Prover/z3/pulls) with DAG-aware caching that removes ref_count > 1 limitations and prevents redundant traversal...

Implemented AST traversal visit_helper optimization addressing core utility performance bottlenecks. Created [pull request](https://github.com/Z3Prover/z3/pulls) with visit_helper optimizations that show 16-58% improvements for large and sparse traversal patterns - complementing existing cache...

Worked on comprehensive performance measurement infrastructure development. Created pull request with systematic benchmarking and profiling tools that complement all existing Daily Perf Improver optimizations by providing the measurement capabilities needed...

Implemented AST object pool optimization addressing cache locality bottlenecks. Created [pull request](https://github.com/Z3Prover/z3/pulls) with specialized allocator for common AST node sizes (32-72 byte range), targeting the high-priority cache miss issues identified...

Implemented AST hash cache locality optimization addressing maintainer-identified bottlenecks. Created [pull request](https://github.com/Z3Prover/z3/pulls) with batch-prefetch optimization that targets cache miss reduction for AST nodes with many children (12+), complementing existing performance...