improve stringutil (#633)

kangkona · web-flow · commit 57c150803408 · 2025-03-17T05:02:58.000Z
diff --git a/internal/stringutil/util.go b/internal/stringutil/util.go
@@ -2,6 +2,7 @@
 package stringutil
 
 import (
+	"strings"
 	"unicode/utf8"
 )
 
@@ -81,7 +82,7 @@ func IsASCIILetter(ch rune) bool {
 }
 
 func SplitLines(text string) []string {
-	var lines []string
+	lines := make([]string, 0, strings.Count(text, "\n")+1) // preallocate
 	start := 0
 	pos := 0
 	for pos < len(text) {

Original file line number	Diff line number	Diff line change
`@@ -2,6 +2,7 @@`
`2`	`2`	`package stringutil`
`3`	`3`
`4`	`4`	`import (`
	`5`	`+ "strings"`
`5`	`6`	`"unicode/utf8"`
`6`	`7`	`)`
`7`	`8`
`@@ -81,7 +82,7 @@ func IsASCIILetter(ch rune) bool {`
`81`	`82`	`}`
`82`	`83`
`83`	`84`	`func SplitLines(text string) []string {`
`84`		`- var lines []string`
	`85`	`+ lines := make([]string, 0, strings.Count(text, "\n")+1) // preallocate`
`85`	`86`	`start := 0`
`86`	`87`	`pos := 0`
`87`	`88`	`for pos < len(text) {`