Improved build performance by optimizing makeMappingKey method. (#8744)

babel · Sep 26, 2018 · 090c364 · 090c364
1 parent f38be13
commit 090c364
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/packages/babel-core/src/transformation/file/merge-map.js b/packages/babel-core/src/transformation/file/merge-map.js
@@ -94,7 +94,7 @@ export default function mergeSourceMap(
 }
 
 function makeMappingKey(item: { line: number, columnStart: number }) {
-  return JSON.stringify([item.line, item.columnStart]);
+  return `${item.line}/${item.columnStart}`;
 }
 
 function eachOverlappingGeneratedOutputRange(