PProf

生成 pprof 文件:

$ go test ./foo -cpuprofile cpu.pprof

查看火焰图:

$ go tool pprof -http :8080 cpu.pprof

Notable Sample

slice 扩容

runtime.growslice

map 扩容

runtime.hashGrow

runtime.mapassign:

runtime.growWork

runtime.mapassign_faststr:

runtime.growWork_faststr

runtime.{mapassign_fast32,mapassign_fast32ptr}:

runtime.growWork_fast32

runtime.{mapassign_fast64,mapassign_fast64ptr}:

runtime.growWork_fast64

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