From f2c78d04ff35688571a66d66c8a2c7c17a095444 Mon Sep 17 00:00:00 2001
From: Mikhail <bodrovmiha@yandex.ru>
Date: Tue, 29 Aug 2023 09:12:28 +0300
Subject: [PATCH] fix: optimize getGlobalCacheKey (#14455)

---
 CHANGELOG.md                                         | 4 ++++
 packages/jest-create-cache-key-function/src/index.ts | 6 ++++--
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9cbc3a0b9fc3..c7c34ab955b6 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,10 @@
 
 ### Fixes
 
+### Performance
+
+- `[@jest/create-cache-key-function]` Cache access of `NODE_ENV` and `BABEL_ENV` ([#14455](https://github.com/jestjs/jest/pull/14455))
+
 ### Chore & Maintenance
 
 ## 29.6.4
diff --git a/packages/jest-create-cache-key-function/src/index.ts b/packages/jest-create-cache-key-function/src/index.ts
index 215a3f4cc2ac..b51583f6f28a 100644
--- a/packages/jest-create-cache-key-function/src/index.ts
+++ b/packages/jest-create-cache-key-function/src/index.ts
@@ -40,14 +40,16 @@ type NewGetCacheKeyFunction = (
 
 type GetCacheKeyFunction = OldGetCacheKeyFunction | NewGetCacheKeyFunction;
 
+const {NODE_ENV, BABEL_ENV} = process.env;
+
 function getGlobalCacheKey(
   files: Array<string>,
   values: Array<string>,
   length: number,
 ) {
   return [
-    process.env.NODE_ENV,
-    process.env.BABEL_ENV,
+    NODE_ENV,
+    BABEL_ENV,
     ...values,
     ...files.map((file: string) => readFileSync(file)),
   ]