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slice_test.go
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/
slice_test.go
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package main
import (
"strconv"
"sync"
"testing"
)
// go test -bench="."
type Something struct {
roomId int
roomName string
}
func BenchmarkDefaultSlice(b *testing.B) {
b.ReportAllocs()
var wg sync.WaitGroup
for i := 0; i < b.N; i++ {
wg.Add(1)
go func(wg *sync.WaitGroup) {
for i := 0; i < 120; i++ {
output := make([]Something, 0)
output = append(output, Something{
roomId: i,
roomName: strconv.Itoa(i),
})
}
wg.Done()
}(&wg)
}
wg.Wait()
}
func BenchmarkPreAllocSlice(b *testing.B) {
b.ReportAllocs()
var wg sync.WaitGroup
for i := 0; i < b.N; i++ {
wg.Add(1)
go func(wg *sync.WaitGroup) {
output := make([]Something, 0, 120)
for i := 0; i < 120; i++ {
output = append(output, Something{
roomId: i,
roomName: strconv.Itoa(i),
})
}
wg.Done()
}(&wg)
}
wg.Wait()
}
func BenchmarkSyncPoolSlice(b *testing.B) {
b.ReportAllocs()
var wg sync.WaitGroup
var SomethingPool = sync.Pool{
New: func() interface{} {
b := make([]Something, 120)
return &b
},
}
for i := 0; i < b.N; i++ {
wg.Add(1)
go func(wg *sync.WaitGroup) {
obj := SomethingPool.Get().(*[]Something)
for i := 0; i < 120; i++ {
some := *obj
some[i].roomId = i
some[i].roomName = strconv.Itoa(i)
}
SomethingPool.Put(obj)
wg.Done()
}(&wg)
}
wg.Wait()
}