pre-allocate strings.Builder for UnderscoreEscaping

boekkooi-impossiblecloud · boekkooi-impossiblecloud · commit e1f4baeaec65 · 2025-09-02T12:18:37.000+02:00
Signed-off-by: warnar boekkooi &lt;wboekkooi@impossiblecloud.com&gt;
diff --git a/model/metric.go b/model/metric.go
@@ -429,6 +429,7 @@ func EscapeName(name string, scheme EscapingScheme) string {
 		if IsValidLegacyMetricName(name) {
 			return name
 		}
+		escaped.Grow(len(name))
 		for i, b := range name {
 			if isValidLegacyRune(b, i) {
 				escaped.WriteRune(b)

Original file line number	Diff line number	Diff line change
`@@ -429,6 +429,7 @@ func EscapeName(name string, scheme EscapingScheme) string {`
`429`	`429`	`if IsValidLegacyMetricName(name) {`
`430`	`430`	`return name`
`431`	`431`	`}`
	`432`	`+ escaped.Grow(len(name))`
`432`	`433`	`for i, b := range name {`
`433`	`434`	`if isValidLegacyRune(b, i) {`
`434`	`435`	`escaped.WriteRune(b)`