perf(compiler-sfc): only add character mapping if not whitespace

packages/compiler-sfc/src/parse.ts

@@ -258,6 +258,7 @@ function generateSourceMap(
       const originalLine = index + 1 + lineOffset
       const generatedLine = index + 1
       for (let i = 0; i < line.length; i++) {
+        if (!/\s/.test(line[i])) {
           map.addMapping({
             source: filename,
             original: {
@@ -271,6 +272,7 @@ function generateSourceMap(
           })
         }
       }
+    }
   })
   return JSON.parse(map.toString())
 }