perf: ReplaceSource source

SyMind · SyMind · commit d1e19a4c5005 · 2025-11-08T00:46:22.000+08:00
diff --git a/src/replace_source.rs b/src/replace_source.rs
@@ -165,7 +165,11 @@ impl Source for ReplaceSource {
     if rope.len() == 1 {
       SourceValue::String(Cow::Borrowed(rope[0]))
     } else {
-      SourceValue::String(Cow::Owned(rope.join("")))
+      let mut string = String::with_capacity(rope.iter().map(|c| c.len()).sum());
+      for chunk in rope {
+        string.push_str(chunk);
+      }
+      SourceValue::String(Cow::Owned(string))
     }
   }
 

Original file line number	Diff line number	Diff line change
`@@ -165,7 +165,11 @@ impl Source for ReplaceSource {`
`165`	`165`	`if rope.len() == 1 {`
`166`	`166`	`SourceValue::String(Cow::Borrowed(rope[0]))`
`167`	`167`	`} else {`
`168`		`- SourceValue::String(Cow::Owned(rope.join("")))`
	`168`	`+ let mut string = String::with_capacity(rope.iter().map(\|c\| c.len()).sum());`
	`169`	`+ for chunk in rope {`
	`170`	`+ string.push_str(chunk);`
	`171`	`+ }`
	`172`	`+ SourceValue::String(Cow::Owned(string))`
`169`	`173`	`}`
`170`	`174`	`}`
`171`	`175`