codec/bench: benchmark using codec's encoder functions

To ensure same sequence of bytes to be decoded, always encode using codec encoder.

codec/bench/bench.sh

@@ -160,7 +160,6 @@ _suite_very_quick_json_non_suite() {
     local t="${1:-x}"
     shift
     echo ">>>> very quick json bench"
-    # local tags=( "x" "x generated" )
     local tags=("${t}" "${t} generated" "${t} codec.safe" "${t} generated codec.safe" "${t} codec.notfastpath")
     local js=( En De )
     for t in "${tags[@]}"; do

codec/bench/bench_test.go

@@ -36,6 +36,7 @@ package codec
 import (
 	"reflect"
 	"runtime"
+	"strings"
 	"testing"
 	"time"
 )
@@ -238,9 +239,24 @@ func fnBenchmarkDecode(b *testing.B, encName string, ts interface{},
 ) {
 	defer benchRecoverPanic(b)
 	testOnce.Do(testInitAll)
-	// ignore method params: ts and newfn, and work on benchTs and TestStruc directly
+
+	// MARKER: to ensure same sequence of bytes to be decoded, always encode using codec encoder.
+	//
+	// ignore method params:
+	// - ts: use benchTs instead
+	// - newfn: use TestStruc instead
+	// - benchEncFn: use codec's encfn instead (based on name/format)
+
 	ts = benchTs
 
+	if strings.Index(encName, "json") != -1 {
+		encfn = fnJsonEncodeFn
+	} else if strings.Index(encName, "cbor") != -1 {
+		encfn = fnCborEncodeFn
+	} else if strings.Index(encName, "msgpack") != -1 {
+		encfn = fnMsgpackEncodeFn
+	}
+
 	buf := make([]byte, 0, approxSize)
 	buf, err := encfn(ts, buf)
 	if err != nil {

codec/bench/z_all_x_bench_test.go

@@ -134,3 +134,11 @@ func BenchmarkCodecQuickAllJsonSuite(t *testing.B) {
 	// benchmarkQuickSuite(t, benchmarkAllJsonEncodeGroup)
 	// benchmarkQuickSuite(t, benchmarkAllJsonDecodeGroup)
 }
+
+func BenchmarkCodecQuickEncode(t *testing.B) {
+	benchmarkQuickSuite(t, "json-all", benchmarkAllJsonEncodeGroup)
+}
+
+func BenchmarkCodecQuickDecode(t *testing.B) {
+	benchmarkQuickSuite(t, "json-all", benchmarkAllJsonDecodeGroup)
+}