Reduce memory allocations during message quoting

Optimization is accomplished by preallocating a fixed-size buffer and
using strconv.AppendQuote instead of always dynamically allocating
memory in strconv.Quote. make([]byte, 0, 1024) doesn't escape to heap at
least in Go 1.19 and 1.23
Signed-off-by: Alexandr Stefurishin <[email protected]>

Author: Alexandr Stefurishin

klog.go

@@ -809,12 +809,16 @@ func (l *loggingT) infoS(logger *logWriter, filter LogFilter, depth int, msg str
 // printS is called from infoS and errorS if logger is not specified.
 // set log severity by s
 func (l *loggingT) printS(err error, s severity.Severity, depth int, msg string, keysAndValues ...interface{}) {
-	// Only create a new buffer if we don't have one cached.
-	b := buffer.GetBuffer()
 	// The message is always quoted, even if it contains line breaks.
 	// If developers want multi-line output, they should use a small, fixed
 	// message and put the multi-line output into a value.
-	b.WriteString(strconv.Quote(msg))
+	qMsg := make([]byte, 0, 1024)
+	qMsg = strconv.AppendQuote(qMsg, msg)
+
+	// Only create a new buffer if we don't have one cached.
+	b := buffer.GetBuffer()
+	b.Write(qMsg)
+
 	if err != nil {
 		serialize.KVListFormat(&b.Buffer, "err", err)
 	}

klogr_slog.go

@@ -63,8 +63,12 @@ func slogOutput(file string, line int, now time.Time, err error, s severity.Seve
 	}
 
 	// See printS.
+	qMsg := make([]byte, 0, 1024)
+	qMsg = strconv.AppendQuote(qMsg, msg)
+
 	b := buffer.GetBuffer()
-	b.WriteString(strconv.Quote(msg))
+	b.Write(qMsg)
+
 	if err != nil {
 		serialize.KVListFormat(&b.Buffer, "err", err)
 	}

textlogger/textlogger.go

@@ -114,6 +114,12 @@ func runtimeBacktrace(skip int) (string, int) {
 }
 
 func (l *tlogger) printWithInfos(file string, line int, now time.Time, err error, s severity.Severity, msg string, kvList []interface{}) {
+	// The message is always quoted, even if it contains line breaks.
+	// If developers want multi-line output, they should use a small, fixed
+	// message and put the multi-line output into a value.
+	qMsg := make([]byte, 0, 1024)
+	qMsg = strconv.AppendQuote(qMsg, msg)
+
 	// Only create a new buffer if we don't have one cached.
 	b := buffer.GetBuffer()
 	defer buffer.PutBuffer(b)
@@ -124,10 +130,8 @@ func (l *tlogger) printWithInfos(file string, line int, now time.Time, err error
 	}
 	b.FormatHeader(s, file, line, now)
 
-	// The message is always quoted, even if it contains line breaks.
-	// If developers want multi-line output, they should use a small, fixed
-	// message and put the multi-line output into a value.
-	b.WriteString(strconv.Quote(msg))
+	b.Write(qMsg)
+
 	if err != nil {
 		serialize.KVFormat(&b.Buffer, "err", err)
 	}