strings: adding micro-optimization for TrimSpace

replace for string's end trimming TrimFunc -> TrimRightFunc strings.TrimSpace string's end trimming should use more specific TrimRightFunc instead of common TrimFunc (because start has already trimmed before) Change-Id: I827f1a25c141e61edfe1f8b11f6e8cd685f8b384 GitHub-Last-Rev: 040607a GitHub-Pull-Request: #46862 Reviewed-on: https://go-review.googlesource.com/c/go/+/329731 Auto-Submit: Russ Cox <[email protected]> TryBot-Result: Gopher Robot <[email protected]> Run-TryBot: Russ Cox <[email protected]> Reviewed-by: Russ Cox <[email protected]> Reviewed-by: Dmitri Shuralyov <[email protected]>
golang · Apr 29, 2022 · e7c56fe · e7c56fe
1 parent a5dd684
commit e7c56fe
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/src/strings/strings.go b/src/strings/strings.go
@@ -962,7 +962,8 @@ func TrimSpace(s string) string {
 	for ; stop > start; stop-- {
 		c := s[stop-1]
 		if c >= utf8.RuneSelf {
-			return TrimFunc(s[start:stop], unicode.IsSpace)
+			// start has been already trimmed above, should trim end only
+			return TrimRightFunc(s[start:stop], unicode.IsSpace)
 		}
 		if asciiSpace[c] == 0 {
 			break