fix traceparent header

Author: asmyasnikov

spans/driver.go

@@ -21,7 +21,7 @@ func traceparent(traceID string, spanID string) string {
 	b.WriteString(traceID)
 	b.WriteByte('-')
 	b.WriteString(spanID)
-	b.WriteString("-0")
+	b.WriteString("-01")
 
 	return b.String()
 }

spans/driver_test.go

@@ -1,71 +1,17 @@
 package spans
 
 import (
-	"fmt"
-	"strings"
 	"testing"
 
 	"github.com/stretchr/testify/require"
-
-	"github.com/ydb-platform/ydb-go-sdk/v3/internal/xstring"
 )
 
-func traceparentFmt(traceID string, spanID string) string {
-	return fmt.Sprintf("00-%s-%s-0", traceID, spanID)
-}
-
-func BenchmarkTraceparentFmt(b *testing.B) {
-	b.ReportAllocs()
-	for i := 0; i < b.N; i++ {
-		traceparent := traceparentFmt("8e3790822789a6917883e08d0eeb783e", "729d847ca290963e")
-		require.Equal(b, "00-8e3790822789a6917883e08d0eeb783e-729d847ca290963e-0", traceparent)
-	}
-}
-
-func traceparentBuilder(traceID string, spanID string) string {
-	var b strings.Builder
-	b.WriteString("00-")
-	b.WriteString(traceID)
-	b.WriteByte('-')
-	b.WriteString(spanID)
-	b.WriteString("-0")
-
-	return b.String()
-}
-
-func BenchmarkTraceparentBuilder(b *testing.B) {
-	b.ReportAllocs()
-	for i := 0; i < b.N; i++ {
-		traceparent := traceparentBuilder("8e3790822789a6917883e08d0eeb783e", "729d847ca290963e")
-		require.Equal(b, "00-8e3790822789a6917883e08d0eeb783e-729d847ca290963e-0", traceparent)
-	}
-}
-
-func traceparentBuffer(traceID string, spanID string) string {
-	b := xstring.Buffer()
-	defer b.Free()
-
-	b.WriteString("00-")
-	b.WriteString(traceID)
-	b.WriteByte('-')
-	b.WriteString(spanID)
-	b.WriteString("-0")
-
-	return b.String()
-}
-
-func BenchmarkTraceparentBuffer(b *testing.B) {
-	b.ReportAllocs()
-	for i := 0; i < b.N; i++ {
-		traceparent := traceparentBuffer("8e3790822789a6917883e08d0eeb783e", "729d847ca290963e")
-		require.Equal(b, "00-8e3790822789a6917883e08d0eeb783e-729d847ca290963e-0", traceparent)
-	}
-}
-
 func BenchmarkTraceparent(b *testing.B) {
 	b.ReportAllocs()
 	for i := 0; i < b.N; i++ {
-		traceparent := traceparent("8e3790822789a6917883e08d0eeb783e", "729d847ca290963e")
-		require.Equal(b, "00-8e3790822789a6917883e08d0eeb783e-729d847ca290963e-0", traceparent)
+		require.Equal(b,
+			"00-8e3790822789a6917883e08d0eeb783e-729d847ca290963e-00",
+			traceparent("8e3790822789a6917883e08d0eeb783e", "729d847ca290963e"),
+		)
 	}
 }