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Update benchmarks.
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‎README.md‎

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@@ -40,43 +40,43 @@ sem.SetLimit(new_limit) // set new semaphore limit
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### Some benchmarks
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Run on MacBook Pro (early 2015) with 2,7GHz Core i5 cpu and 16GB DDR3 ram:
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Run on MacBook Pro (2017) with 3,1GHz Core i5 cpu and 8GB DDR3 ram, macOS High Sierra, go version go1.11.4 darwin/amd64:
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```text
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// this semaphore:
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BenchmarkSemaphore_Acquire_Release_under_limit_simple-4 50000000 31.1 ns/op 0 B/op 0 allocs/op
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BenchmarkSemaphore_Acquire_Release_under_limit-4 1000000 1383 ns/op 0 B/op 0 allocs/op
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BenchmarkSemaphore_Acquire_Release_over_limit-4 100000 13468 ns/op 24 B/op 0 allocs/op
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BenchmarkSemaphore_Acquire_Release_under_limit_simple-4 20000000 98.6 ns/op 96 B/op 1 allocs/op
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BenchmarkSemaphore_Acquire_Release_under_limit-4 1000000 1593 ns/op 960 B/op 10 allocs/op
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BenchmarkSemaphore_Acquire_Release_over_limit-4 100000 20760 ns/op 9600 B/op 100 allocs/op
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// some other implementations:
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// golang.org/x/sync/semaphore:
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BenchmarkXSyncSemaphore_Acquire_Release_under_limit_simple-4 30000000 51.8 ns/op 0 B/op 0 allocs/op
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BenchmarkXSyncSemaphore_Acquire_Release_under_limit-4 500000 2655 ns/op 0 B/op 0 allocs/op
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BenchmarkXSyncSemaphore_Acquire_Release_over_limit-4 20000 100004 ns/op 15991 B/op 299 allocs/op
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BenchmarkXSyncSemaphore_Acquire_Release_under_limit_simple-4 50000000 34.9 ns/op 0 B/op 0 allocs/op
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BenchmarkXSyncSemaphore_Acquire_Release_under_limit-4 1000000 1103 ns/op 0 B/op 0 allocs/op
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BenchmarkXSyncSemaphore_Acquire_Release_over_limit-4 30000 65927 ns/op 15985 B/op 299 allocs/op
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// github.com/abiosoft/semaphore:
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BenchmarkAbiosoftSemaphore_Acquire_Release_under_limit_simple-4 5000000 269 ns/op 0 B/op 0 allocs/op
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BenchmarkAbiosoftSemaphore_Acquire_Release_under_limit-4 300000 5602 ns/op 0 B/op 0 allocs/op
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BenchmarkAbiosoftSemaphore_Acquire_Release_over_limit-4 30000 54090 ns/op 0 B/op 0 allocs/op
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BenchmarkAbiosoftSemaphore_Acquire_Release_under_limit_simple-4 10000000 208 ns/op 0 B/op 0 allocs/op
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BenchmarkAbiosoftSemaphore_Acquire_Release_under_limit-4 500000 3147 ns/op 0 B/op 0 allocs/op
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BenchmarkAbiosoftSemaphore_Acquire_Release_over_limit-4 50000 37148 ns/op 0 B/op 0 allocs/op
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// github.com/dropbox/godropbox
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BenchmarkDropboxBoundedSemaphore_Acquire_Release_under_limit_simple-4 20000000 99.6 ns/op 0 B/op 0 allocs/op
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BenchmarkDropboxBoundedSemaphore_Acquire_Release_under_limit-4 1000000 1343 ns/op 0 B/op 0 allocs/op
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BenchmarkDropboxBoundedSemaphore_Acquire_Release_over_limit-4 100000 35735 ns/op 0 B/op 0 allocs/op
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BenchmarkDropboxUnboundedSemaphore_Acquire_Release_under_limit_simple-4 30000000 56.0 ns/op 0 B/op 0 allocs/op
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BenchmarkDropboxUnboundedSemaphore_Acquire_Release_under_limit-4 500000 2871 ns/op 0 B/op 0 allocs/op
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BenchmarkDropboxUnboundedSemaphore_Acquire_Release_over_limit-4 30000 41089 ns/op 0 B/op 0 allocs/op
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BenchmarkDropboxBoundedSemaphore_Acquire_Release_under_limit_simple-4 20000000 75.9 ns/op 0 B/op 0 allocs/op
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BenchmarkDropboxBoundedSemaphore_Acquire_Release_under_limit-4 2000000 629 ns/op 0 B/op 0 allocs/op
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BenchmarkDropboxBoundedSemaphore_Acquire_Release_over_limit-4 200000 27308 ns/op 0 B/op 0 allocs/op
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BenchmarkDropboxUnboundedSemaphore_Acquire_Release_under_limit_simple-4 50000000 39.7 ns/op 0 B/op 0 allocs/op
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BenchmarkDropboxUnboundedSemaphore_Acquire_Release_under_limit-4 1000000 1170 ns/op 0 B/op 0 allocs/op
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BenchmarkDropboxUnboundedSemaphore_Acquire_Release_over_limit-4 100000 21013 ns/op 0 B/op 0 allocs/op
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// github.com/kamilsk/semaphore
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BenchmarkKamilskSemaphore_Acquire_Release_under_limit_simple-4 10000000 170 ns/op 16 B/op 1 allocs/op
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BenchmarkKamilskSemaphore_Acquire_Release_under_limit-4 500000 3023 ns/op 160 B/op 10 allocs/op
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BenchmarkKamilskSemaphore_Acquire_Release_over_limit-4 20000 67687 ns/op 1600 B/op 100 allocs/op
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BenchmarkKamilskSemaphore_Acquire_Release_under_limit_simple-4 20000000 110 ns/op 16 B/op 1 allocs/op
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BenchmarkKamilskSemaphore_Acquire_Release_under_limit-4 1000000 1520 ns/op 160 B/op 10 allocs/op
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BenchmarkKamilskSemaphore_Acquire_Release_over_limit-4 50000 42693 ns/op 1600 B/op 100 allocs/op
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// github.com/pivotal-golang/semaphore
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BenchmarkPivotalGolangSemaphore_Acquire_Release_under_limit_simple-4 1000000 1006 ns/op 136 B/op 2 allocs/op
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BenchmarkPivotalGolangSemaphore_Acquire_Release_under_limit-4 100000 11837 ns/op 1280 B/op 20 allocs/op
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BenchmarkPivotalGolangSemaphore_Acquire_Release_over_limit-4 10000 128890 ns/op 12800 B/op 200 allocs/op
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BenchmarkPivotalGolangSemaphore_Acquire_Release_under_limit_simple-4 3000000 558 ns/op 136 B/op 2 allocs/op
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BenchmarkPivotalGolangSemaphore_Acquire_Release_under_limit-4 200000 9530 ns/op 1280 B/op 20 allocs/op
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BenchmarkPivotalGolangSemaphore_Acquire_Release_over_limit-4 10000 111264 ns/op 12801 B/op 200 allocs/op
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```
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You can rerun these benchmarks, just checkout `benchmarks` branch and run `go test -bench=. -benchmem ./bench/...`

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