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Go Performans Rehberi
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Oğuzhan
July 25, 2020
Technology
1
300
Go Performans Rehberi
https://gophercon.ist/
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Oğuzhan
July 25, 2020
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Transcript
Oğuzhan Yılmaz Go Performans Rehberi
min. Go 1.14
if > switch
13.5 ns/op 15.5 ns/op
12.1 ns/op
strconv > fmt
BenchmarkStrconv-16 19381725 67.5 ns/op 32 B/op 1 allocs/op BenchmarkFmt-16 5839038
222 ns/op 72 B/op 3 allocs/op 67.5 ns/op
make([]int, 0, 10) > []int{}
BenchmarkMakeSliceWithCap-16 1000000000 0.234 ns/op 0 B/op 0 allocs/op BenchmarkMakeSlice-16 65739
17390 ns/op 16376 B/op 11 allocs/op 0.234 ns/op
strings.Builder > “a” + “b”
BenchmarkStringBuildNaive-16 6573120 174 ns/op 32 B/op 6 allocs/op BenchmarkStringBuildBuilder-16 19740784
62.4 ns/op 64 B/op 1 allocs/op 62.4 ns/op
bytes.Replace > strings.Replace bytes Concat > strings Concat bytes Concat
> strings Join
70.1 ns/op BenchmarkBytesReplace-4 20000000 70.1 ns/op 32 B/op 1 allocs/op
BenchmarkStringsReplace-4 10000000 132 ns/op 64 B/op 2 allocs/op
https://github.com/valyala/fasthttp
binary.BigEndian.PutUint32 > binary.Write
1075 ns/op 113 ns/op
sync.Pool
None
_ = make([]byte, 10<<30)
runtime.MemProfileRate = 0 https://golang.org/pkg/runtime/
syscal.SYS_MMAP
None
map[int]int{} > map[string]int{}
3 ms/op
json.Marshal(Struct) > json.Marshal(Map)
BenchmarkMarshallStruct-16 4721078 230 ns/op 64 B/op 2 allocs/op BenchmarkMakeSlice-16 1843551
665 ns/op 512 B/op 10 allocs/op 230 ns/op
Atomic > Mutex
BenchmarkIncrementMutex-16 87149690 12.3 ns/op 0 B/op 0 allocs/op BenchmarkIncrementMutexNoDefer-16 99812758
12.2 ns/op 0 B/op 0 allocs/op BenchmarkIncrementAtomic-16 286304998 4.19 ns/op 0 B/op 0 allocs/op BenchmarkConcurrentMutex-16 226051 5104 ns/op 16 B/op 1 allocs/op BenchmarkConcurrentMutexNoDefer-16 235743 4941 ns/op 16 B/op 1 allocs/op BenchmarkConcurrentAtomic-16 260210 4635 ns/op 16 B/op 1 allocs/op 4.19 ns/op
1. https://github.com/dgryski/go-perfbook/blob/master/performance.md 2. https://stephen.sh/posts/quick-go-performance-improvements 3. https://hashrocket.com/blog/posts/go-performance-observations 4. https://gist.github.com/vitalyisaev2/5791627ffc48f10c2fde22c2a5dd32ee