56 lines
902 B
Go
56 lines
902 B
Go
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package main
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import (
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"fmt"
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"math/rand"
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"net/http"
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"runtime"
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"time"
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_ "github.com/Xe/gopreload"
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"github.com/Xe/ln"
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)
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func main() {
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http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
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spew()
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ln.Log(ln.F{"action": "gc_spew", "who": r.RemoteAddr})
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fmt.Fprintln(w, "done")
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})
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http.ListenAndServe(":9184", nil)
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}
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func makeBuffer() []byte {
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return make([]byte, rand.Intn(5000000)+5000000)
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}
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func spew() {
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pool := make([][]byte, 20)
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var m runtime.MemStats
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makes := 0
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for _ = range make([]struct{}, 50) {
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b := makeBuffer()
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makes += 1
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i := rand.Intn(len(pool))
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pool[i] = b
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time.Sleep(time.Millisecond * 250)
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bytes := 0
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for i := 0; i < len(pool); i++ {
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if pool[i] != nil {
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bytes += len(pool[i])
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}
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}
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runtime.ReadMemStats(&m)
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fmt.Printf("%d,%d,%d,%d,%d,%d\n", m.HeapSys, bytes, m.HeapAlloc,
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m.HeapIdle, m.HeapReleased, makes)
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}
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}
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