Merge pull request #78 from josharian/josh/optimize-intable

mattn · web-flow · commit 7770d045cdc6 · 2025-09-29T22:35:08.000+09:00
add early exit to inTable
diff --git a/runewidth.go b/runewidth.go
@@ -64,6 +64,9 @@ func inTable(r rune, t table) bool {
 	if r < t[0].first {
 		return false
 	}
+	if r > t[len(t)-1].last {
+		return false
+	}
 
 	bot := 0
 	top := len(t) - 1

Original file line number	Diff line number	Diff line change
`@@ -64,6 +64,9 @@ func inTable(r rune, t table) bool {`
`64`	`64`	`if r < t[0].first {`
`65`	`65`	`return false`
`66`	`66`	`}`
	`67`	`+ if r > t[len(t)-1].last {`
	`68`	`+ return false`
	`69`	`+ }`
`67`	`70`
`68`	`71`	`bot := 0`
`69`	`72`	`top := len(t) - 1`