Add byte/string equality check benchmark

test/labels_test.go

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