perf(compiler-core): set simple expression outside map (#485)

diff --git a/packages/compiler-core/src/transforms/transformElement.ts b/packages/compiler-core/src/transforms/transformElement.ts
index 8e71a714d10ee4ca5f9e6172fbd8f2f2120422b7..14335ce30a7347eb5aca547a9d98c6bc2780961a 100644 (file)
--- a/packages/compiler-core/src/transforms/transformElement.ts
+++ b/packages/compiler-core/src/transforms/transformElement.ts
@@ -498,13 +498,11 @@ function buildDirectiveArgs(
       }
       dirArgs.push(`void 0`)
     }
+    const trueExpression = createSimpleExpression(`true`, false, loc)
     dirArgs.push(
       createObjectExpression(
         dir.modifiers.map(modifier =>
-          createObjectProperty(
-            modifier,
-            createSimpleExpression(`true`, false, loc)
-          )
+          createObjectProperty(modifier, trueExpression)
         ),
         loc
       )