perf: skip hasScopeRef check if there are no scope vars

yyx990803 · yyx990803 · commit b980ddb607f1 · 2019-10-16T15:35:04.000-04:00
diff --git a/packages/compiler-core/src/transforms/vSlot.ts b/packages/compiler-core/src/transforms/vSlot.ts
@@ -342,7 +342,7 @@ function hasScopeRef(
   node: TemplateChildNode | IfBranchNode | SimpleExpressionNode | undefined,
   ids: TransformContext['identifiers']
 ): boolean {
-  if (!node) {
+  if (!node || Object.keys(ids).length === 0) {
     return false
   }
   switch (node.type) {

Original file line number	Diff line number	Diff line change
`@@ -342,7 +342,7 @@ function hasScopeRef(`
`342`	`342`	`node: TemplateChildNode \| IfBranchNode \| SimpleExpressionNode \| undefined,`
`343`	`343`	`ids: TransformContext['identifiers']`
`344`	`344`	`): boolean {`
`345`		`- if (!node) {`
	`345`	`+ if (!node \|\| Object.keys(ids).length === 0) {`
`346`	`346`	`return false`
`347`	`347`	`}`
`348`	`348`	`switch (node.type) {`