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// Copyright 2009 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package vector
import (
"fmt"
"runtime"
"strings"
"testing"
)
const memTestN = 1000000
func s(n uint64) string {
str := fmt.Sprintf("%d", n)
lens := len(str)
a := make([]string, (lens+2)/3)
start := lens
for i := range a {
start -= 3
if start < 0 {
start = 0
}
a[len(a)-i-1] = str[start:lens]
lens -= 3
}
return strings.Join(a, " ")
}
func TestVectorNums(t *testing.T) {
var v Vector
c := int(0)
runtime.GC()
m0 := runtime.MemStats
v.Resize(memTestN, memTestN)
for i := 0; i < memTestN; i++ {
v.Set(i, c)
}
runtime.GC()
m := runtime.MemStats
v.Resize(0, 0)
runtime.GC()
n := m.Alloc - m0.Alloc
t.Logf("%T.Push(%#v), n = %s: Alloc/n = %.2f\n", v, c, s(memTestN), float64(n)/memTestN)
}
func TestIntVectorNums(t *testing.T) {
var v IntVector
c := int(0)
runtime.GC()
m0 := runtime.MemStats
v.Resize(memTestN, memTestN)
for i := 0; i < memTestN; i++ {
v.Set(i, c)
}
runtime.GC()
m := runtime.MemStats
v.Resize(0, 0)
runtime.GC()
n := m.Alloc - m0.Alloc
t.Logf("%T.Push(%#v), n = %s: Alloc/n = %.2f\n", v, c, s(memTestN), float64(n)/memTestN)
}
func TestStringVectorNums(t *testing.T) {
var v StringVector
c := ""
runtime.GC()
m0 := runtime.MemStats
v.Resize(memTestN, memTestN)
for i := 0; i < memTestN; i++ {
v.Set(i, c)
}
runtime.GC()
m := runtime.MemStats
v.Resize(0, 0)
runtime.GC()
n := m.Alloc - m0.Alloc
t.Logf("%T.Push(%#v), n = %s: Alloc/n = %.2f\n", v, c, s(memTestN), float64(n)/memTestN)
}
func BenchmarkVectorNums(b *testing.B) {
c := int(0)
var v Vector
b.StopTimer()
runtime.GC()
b.StartTimer()
for i := 0; i < b.N; i++ {
v.Push(c)
}
}
func BenchmarkIntVectorNums(b *testing.B) {
c := int(0)
var v IntVector
b.StopTimer()
runtime.GC()
b.StartTimer()
for i := 0; i < b.N; i++ {
v.Push(c)
}
}
func BenchmarkStringVectorNums(b *testing.B) {
c := ""
var v StringVector
b.StopTimer()
runtime.GC()
b.StartTimer()
for i := 0; i < b.N; i++ {
v.Push(c)
}
}
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