Исходники и презентации

lessons/strings/speed_concatenation/concatenation_test.go

@@ -0,0 +1,45 @@
+package main
+
+import (
+	"fmt"
+	"strings"
+	"testing"
+)
+
+// go test -bench=. concatenation_test.go
+
+func BenchmarkConcatenationWithSprintf(b *testing.B) {
+	s0 := "str1"
+	s1 := "str2"
+	s2 := "str3"
+	s3 := "str4"
+
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		_ = fmt.Sprintf("%s%s%s%s", s0, s1, s2, s3)
+	}
+}
+
+func BenchmarkConcatenationWithOperatorPlus(b *testing.B) {
+	s0 := "str1"
+	s1 := "str2"
+	s2 := "str3"
+	s3 := "str4"
+
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		_ = s0 + s1 + s2 + s3
+	}
+}
+
+func BenchmarkConcatenationWithJoin(b *testing.B) {
+	s0 := "str1"
+	s1 := "str2"
+	s2 := "str3"
+	s3 := "str4"
+
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		_ = strings.Join([]string{s0, s1, s2, s3}, "")
+	}
+}