From 5cabe0e5deec25c3240d2cfe189f2d210d0cd244 Mon Sep 17 00:00:00 2001
From: Andy Hanson <anhans@microsoft.com>
Date: Thu, 13 Jul 2017 14:32:42 -0700
Subject: [PATCH 1/2] Reuse stored types for any[] and Promise<any> instead of
 creating new ones

---
 src/compiler/checker.ts | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index 6c5fcc36e4df1..cb5d5ad2d2c2d 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -298,6 +298,7 @@ namespace ts {
         let globalBooleanType: ObjectType;
         let globalRegExpType: ObjectType;
         let globalThisType: GenericType;
+        let anyPromiseType: Type;
         let anyArrayType: Type;
         let autoArrayType: Type;
         let anyReadonlyArrayType: Type;
@@ -6890,10 +6891,10 @@ 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;
+                        return !node.typeArguments || !node.typeArguments.length ? anyPromiseType : undefined;
                 }
             }
         }
@@ -23486,6 +23487,7 @@ namespace ts {
             globalNumberType = getGlobalType("Number" as __String, /*arity*/ 0, /*reportErrors*/ true);
             globalBooleanType = getGlobalType("Boolean" as __String, /*arity*/ 0, /*reportErrors*/ true);
             globalRegExpType = getGlobalType("RegExp" as __String, /*arity*/ 0, /*reportErrors*/ true);
+            anyPromiseType = createPromiseType(anyType);
             anyArrayType = createArrayType(anyType);
             autoArrayType = createArrayType(autoType);
 

From 82758590b34601080a8be71a6abf7cc664adcf09 Mon Sep 17 00:00:00 2001
From: Andy Hanson <anhans@microsoft.com>
Date: Fri, 14 Jul 2017 11:06:36 -0700
Subject: [PATCH 2/2] Don't store anyPromiseType

---
 src/compiler/checker.ts | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index cb5d5ad2d2c2d..b0c79d16e46e8 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -298,7 +298,6 @@ namespace ts {
         let globalBooleanType: ObjectType;
         let globalRegExpType: ObjectType;
         let globalThisType: GenericType;
-        let anyPromiseType: Type;
         let anyArrayType: Type;
         let autoArrayType: Type;
         let anyReadonlyArrayType: Type;
@@ -6894,7 +6893,7 @@ namespace ts {
                         return !node.typeArguments || !node.typeArguments.length ? anyArrayType : undefined;
                     case "Promise":
                     case "promise":
-                        return !node.typeArguments || !node.typeArguments.length ? anyPromiseType : undefined;
+                        return !node.typeArguments || !node.typeArguments.length ? createPromiseType(anyType) : undefined;
                 }
             }
         }
@@ -23487,7 +23486,6 @@ namespace ts {
             globalNumberType = getGlobalType("Number" as __String, /*arity*/ 0, /*reportErrors*/ true);
             globalBooleanType = getGlobalType("Boolean" as __String, /*arity*/ 0, /*reportErrors*/ true);
             globalRegExpType = getGlobalType("RegExp" as __String, /*arity*/ 0, /*reportErrors*/ true);
-            anyPromiseType = createPromiseType(anyType);
             anyArrayType = createArrayType(anyType);
             autoArrayType = createArrayType(autoType);