feat: use runtime.rawstring to make bytes without clear memory

[jayantxie]

[jayantxie]

tiger@xxx:~/xiezhengyao/github.com/jayantxie/gopkg/lang/dirtmake$ GOMAXPROCS=1 GOGC=1000 go test -v -bench=. -benchmem -benchtime=5s
goos: linux
goarch: amd64
pkg: github.com/bytedance/gopkg/lang/dirtmake
cpu: Intel(R) Xeon(R) Gold 5118 CPU @ 2.30GHz
BenchmarkFastMake
BenchmarkFastMake/size=1024
BenchmarkFastMake/size=1024         	75632510	        80.88 ns/op	    1024 B/op	       1 allocs/op
BenchmarkFastMake/size=3072
BenchmarkFastMake/size=3072         	56139994	       104.1 ns/op	    3072 B/op	       1 allocs/op
BenchmarkFastMake/size=5120
BenchmarkFastMake/size=5120         	25204423	       213.5 ns/op	    5376 B/op	       1 allocs/op
BenchmarkFastMake/size=7168
BenchmarkFastMake/size=7168         	12370452	       498.2 ns/op	    8192 B/op	       1 allocs/op
BenchmarkFastMake/size=9216
BenchmarkFastMake/size=9216         	35381056	       177.0 ns/op	    9472 B/op	       1 allocs/op
BenchmarkFastMake/size=11264
BenchmarkFastMake/size=11264        	15790495	       371.2 ns/op	   12288 B/op	       1 allocs/op
BenchmarkFastMake/size=13312
BenchmarkFastMake/size=13312        	24623552	       282.5 ns/op	   13568 B/op	       1 allocs/op
BenchmarkFastMake/size=15360
BenchmarkFastMake/size=15360        	 8764629	       650.0 ns/op	   16384 B/op	       1 allocs/op
BenchmarkFastMake/size=17408
BenchmarkFastMake/size=17408        	21286158	       324.7 ns/op	   18432 B/op	       1 allocs/op
BenchmarkFastMake/size=19456
BenchmarkFastMake/size=19456        	15668707	       420.1 ns/op	   20480 B/op	       1 allocs/op
BenchmarkOriginMake
BenchmarkOriginMake/size=1024
BenchmarkOriginMake/size=1024       	27477183	       207.9 ns/op	    1024 B/op	       1 allocs/op
BenchmarkOriginMake/size=3072
BenchmarkOriginMake/size=3072       	 7992910	       742.3 ns/op	    3072 B/op	       1 allocs/op
BenchmarkOriginMake/size=5120
BenchmarkOriginMake/size=5120       	 4515583	      1307 ns/op	    5376 B/op	       1 allocs/op
BenchmarkOriginMake/size=7168
BenchmarkOriginMake/size=7168       	 2712064	      2203 ns/op	    8192 B/op	       1 allocs/op
BenchmarkOriginMake/size=9216
BenchmarkOriginMake/size=9216       	 3215642	      1868 ns/op	    9472 B/op	       1 allocs/op
BenchmarkOriginMake/size=11264
BenchmarkOriginMake/size=11264      	 2260072	      2579 ns/op	   12288 B/op	       1 allocs/op
BenchmarkOriginMake/size=13312
BenchmarkOriginMake/size=13312      	 2234844	      2655 ns/op	   13568 B/op	       1 allocs/op
BenchmarkOriginMake/size=15360
BenchmarkOriginMake/size=15360      	 1659430	      3624 ns/op	   16384 B/op	       1 allocs/op
BenchmarkOriginMake/size=17408
BenchmarkOriginMake/size=17408      	 1748785	      3348 ns/op	   18432 B/op	       1 allocs/op
BenchmarkOriginMake/size=19456
BenchmarkOriginMake/size=19456      	 1513047	      3991 ns/op	   20480 B/op	       1 allocs/op
PASS
ok  	github.com/bytedance/gopkg/lang/dirtmake	151.884s