Исходники и презентации

lessons/strings/rune_to_bytes_test/perf_test.go

@@ -0,0 +1,39 @@
+package main
+
+import (
+	"testing"
+	"unicode/utf8"
+)
+
+func RunesToBytes(rs []rune) []byte {
+	n := 0
+	for _, r := range rs {
+		n += utf8.RuneLen(r)
+	}
+
+	n, bs := 0, make([]byte, n)
+	for _, r := range rs {
+		n += utf8.EncodeRune(bs[n:], r)
+	}
+
+	return bs
+}
+
+// go test -bench=. -benchmem perf_test.go
+
+var Result []byte
+var str string = "€€€v€wqeqwwerrerrqw12313123€€€v€€€€v€€€€v€€€€v€"
+
+func BenchmarkConversion(b *testing.B) {
+	rs := []rune(str + "sdfsfs€€€v€€€€v€23423423")
+	for i := 0; i < b.N; i++ {
+		Result = RunesToBytes(rs)
+	}
+}
+
+func BenchmarkConversionWithStr(b *testing.B) {
+	rs := []rune(str + "sdfsfs€€€v€€€€v€23423423")
+	for i := 0; i < b.N; i++ {
+		Result = []byte(string(rs))
+	}
+}