perf: improve clear efficiency (#42)

* perf: improve `clear` efficiency * chore: improve scope
wellwelwel · Sep 20, 2024 · e087a57 · e087a57
1 parent d0b8727
commit e087a57
Showing 1 changed file with 10 additions and 2 deletions.
diff --git a/src/index.ts b/src/index.ts
@@ -184,8 +184,16 @@ export const createLRU = <Key, Value>(options: CacheOptions<Key, Value>) => {
 
     /** Clears all key-value pairs from the cache. */
     clear(): undefined {
-      for (const index of keyMap.values())
-        onEviction?.(keyList[index]!, valList[index]!);
+      if (typeof onEviction === 'function') {
+        const iterator = keyMap.values();
+
+        for (
+          let result = iterator.next();
+          !result.done;
+          result = iterator.next()
+        )
+          onEviction(keyList[result.value]!, valList[result.value]!);
+      }
 
       keyMap.clear();
       keyList.fill(undefined);