From 21d87b184c878f1cdb21b839e6561db63ae9d09e Mon Sep 17 00:00:00 2001
From: xixu-me <i@xi-xu.me>
Date: Wed, 19 Aug 2026 16:23:36 +0800
Subject: [PATCH] fix(retry): avoid CPU busy wait

---
 src/lib/rateLimit.ts        | 16 ++--------------
 tests/lib/rateLimit.test.ts |  4 +++-
 2 files changed, 5 insertions(+), 15 deletions(-)

diff --git a/src/lib/rateLimit.ts b/src/lib/rateLimit.ts
index f6abb5d..e0ea816 100644
--- a/src/lib/rateLimit.ts
+++ b/src/lib/rateLimit.ts
@@ -169,20 +169,8 @@ export async function checkRateLimit(
  * @param seconds - Number of seconds to delay
  * @returns Promise that resolves after the specified delay
  */
-export async function delayRequest(seconds: number): Promise<void> {
-  return new Promise((resolve) => {
-    // Use a simple delay implementation for Workers environment
-    const start = Date.now();
-    const checkTime = () => {
-      if (Date.now() - start >= seconds * 1000) {
-        resolve();
-      } else {
-        // Use minimal delay to prevent blocking
-        Promise.resolve().then(checkTime);
-      }
-    };
-    checkTime();
-  });
+export function delayRequest(seconds: number): Promise<void> {
+  return new Promise((resolve) => setTimeout(resolve, seconds * 1000));
 }
 
 /**
diff --git a/tests/lib/rateLimit.test.ts b/tests/lib/rateLimit.test.ts
index 3f053d7..460b99c 100644
--- a/tests/lib/rateLimit.test.ts
+++ b/tests/lib/rateLimit.test.ts
@@ -16,7 +16,7 @@ describe("Rate Limit Module", () => {
   });
 
   afterEach(() => {
-    jest.clearAllMocks();
+    jest.restoreAllMocks();
   });
 
   describe("getClientIP", () => {
@@ -90,10 +90,12 @@ describe("Rate Limit Module", () => {
     });
 
     it("should handle zero delay", async () => {
+      const timer = jest.spyOn(globalThis, "setTimeout");
       const startTime = Date.now();
       await delayRequest(0);
       const endTime = Date.now();
 
+      expect(timer).toHaveBeenCalledTimes(1);
       expect(endTime - startTime).toBeLessThan(50);
     });
   });