61 lines
1.6 KiB
Go
61 lines
1.6 KiB
Go
package cmap
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import (
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"fmt"
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"go-admin/pkg/utility"
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"hash/crc32"
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"testing"
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)
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// 离散性测试
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func Test_fnv32(t *testing.T) {
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st := make(map[uint32]int)
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for i := 0; i < 1000000; i++ {
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fnv := crc32.ChecksumIEEE([]byte(utility.GenerateRandString(8)))
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k := fnv & 15
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count, ok := st[k]
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if !ok {
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st[k] = 1
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}
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st[k] = count + 1
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}
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for k, v := range st {
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fmt.Println(k, "\t", float64(v)/1000000)
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}
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}
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// go test -bench=_QE_ -benchmem -run=^$
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// -benchtime 默认为1秒 -benchmem 获得内存分配的统计数据
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// Benchmark_QE_1-6 146641 8192 ns/op 32 B/op 3 allocs/op
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// Benchmark_QE_2-6 143118 8246 ns/op 40 B/op 4 allocs/op
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//
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// Benchmark_QE_1-6 146289 8212 ns/op 32 B/op 3 allocs/op
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// Benchmark_QE_2-6 144918 8239 ns/op 40 B/op 4 allocs/op
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func Benchmark_QE_1(b *testing.B) {
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for i := 0; i < b.N; i++ {
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fnv32(utility.GenerateRandString(8))
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}
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}
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func Benchmark_QE_2(b *testing.B) {
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for i := 0; i < b.N; i++ {
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crc32.ChecksumIEEE([]byte(utility.GenerateRandString(8)))
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}
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}
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// go test -bench=_QE2_ -benchmem -benchtime=5s -run=^$
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// -benchtime 默认为1秒 -benchmem 获得内存分配的统计数据
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// Benchmark_QE2_1-6 1000000000 0.2623 ns/op 0 B/op 0 allocs/op
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// Benchmark_QE2_2-6 1000000000 0.2631 ns/op 0 B/op 0 allocs/op
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func Benchmark_QE2_1(b *testing.B) {
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for i := 0; i < b.N; i++ {
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_ = i & 31
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}
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}
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func Benchmark_QE2_2(b *testing.B) {
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for i := 0; i < b.N; i++ {
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_ = i % 31
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}
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}
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