[go-nuts] go analysis memory mallocs

[刘桂祥]

// example1.go
package main


import "runtime"


func main() {
    m := new(runtime.MemStats)
    runtime.ReadMemStats(m)
    println(m.Alloc, m.Mallocs)
    cap := 1024 * 1024 * 3
    s := make([]byte, cap)
    _ = s
    runtime.ReadMemStats(m)
    println(m.Alloc, m.Mallocs)
}

go run example1.go
32744 65
3178472 66

// example2.go
package main


import "runtime"


func main() {
    m := new(runtime.MemStats)
    runtime.ReadMemStats(m)
    println(m.Alloc, m.Mallocs)
    cap := 1024 * 1024 * 4
    s := make([]byte, cap)
    _ = s
    runtime.ReadMemStats(m)
    println(m.Alloc, m.Mallocs)
}

go run example2.go
32744 65
4228984 77

why it have 12 times mallocs ??

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