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https://github.com/prometheus/prometheus
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Add byte/string equality check benchmark
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parent
b2f1db5666
commit
205edd2da9
@ -1,6 +1,7 @@
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package test
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import (
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"bytes"
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"testing"
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"github.com/fabxc/tsdb"
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@ -52,3 +53,77 @@ func BenchmarkLabelSetAccess(b *testing.B) {
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_ = v
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}
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func BenchmarkStringBytesEquals(b *testing.B) {
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cases := []struct {
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name string
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a, b string
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}{
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{
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name: "equal",
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a: "sdfn492cn9xwm0ws8r,4932x98f,uj594cxf594802h875hgzz0h3586x8xz,359",
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b: "sdfn492cn9xwm0ws8r,4932x98f,uj594cxf594802h875hgzz0h3586x8xz,359",
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},
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{
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name: "1-flip-end",
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a: "sdfn492cn9xwm0ws8r,4932x98f,uj594cxf594802h875hgzz0h3586x8xz,359",
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b: "sdfn492cn9xwm0ws8r,4932x98f,uj594cxf594802h875hgzz0h3586x8xz,353",
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},
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{
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name: "1-flip-middle",
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a: "sdfn492cn9xwm0ws8r,4932x98f,uj594cxf594802h875hgzz0h3586x8xz,359",
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b: "sdfn492cn9xwm0ws8r,4932x98f,uj504cxf594802h875hgzz0h3586x8xz,359",
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},
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{
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name: "1-flip-start",
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a: "sdfn492cn9xwm0ws8r,4932x98f,uj594cxf594802h875hgzz0h3586x8xz,359",
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b: "adfn492cn9xwm0ws8r,4932x98f,uj594cxf594802h875hgzz0h3586x8xz,359",
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},
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{
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name: "different-length",
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a: "sdfn492cn9xwm0ws8r,4932x98f,uj594cxf594802h875hgzz0h3586x8xz,359",
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b: "sdfn492cn9xwm0ws8r,4932x98f,uj594cxf594802h875hgzz0h3586x8xz,35",
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},
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}
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for _, c := range cases {
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b.Run(c.name+"-strings", func(b *testing.B) {
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as, bs := c.a, c.b
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b.SetBytes(int64(len(as)))
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var r bool
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for i := 0; i < b.N; i++ {
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r = as == bs
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}
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_ = r
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})
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b.Run(c.name+"-bytes", func(b *testing.B) {
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ab, bb := []byte(c.a), []byte(c.b)
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b.SetBytes(int64(len(ab)))
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var r bool
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for i := 0; i < b.N; i++ {
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r = bytes.Equal(ab, bb)
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}
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_ = r
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})
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b.Run(c.name+"-bytes-length-check", func(b *testing.B) {
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ab, bb := []byte(c.a), []byte(c.b)
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b.SetBytes(int64(len(ab)))
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var r bool
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for i := 0; i < b.N; i++ {
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if len(ab) != len(bb) {
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continue
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}
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r = bytes.Equal(ab, bb)
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}
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_ = r
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})
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}
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}
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