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