Reuse stored types for any[] and Promise<any> instead of creating new ones (microsoft#17179)

Andy · web-flow · commit 5d46ca7118b0 · 2017-07-17T12:56:58.000-07:00
* Reuse stored types for any[] and Promise&lt;any&gt; instead of creating new ones

* Don't store anyPromiseType
diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
@@ -6892,7 +6892,7 @@ namespace ts {
                         return globalFunctionType;
                     case "Array":
                     case "array":
-                        return !node.typeArguments || !node.typeArguments.length ? createArrayType(anyType) : undefined;
+                        return !node.typeArguments || !node.typeArguments.length ? anyArrayType : undefined;
                     case "Promise":
                     case "promise":
                         return !node.typeArguments || !node.typeArguments.length ? createPromiseType(anyType) : undefined;
