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cache_legacy.ts (Before)

18 lines

 1 class LegacyCache<K, V> {
 2   private map = new Map<K, V>();
 3   constructor(private capacity: number) {}
 4 
 5   get(key: K): V | undefined {
 6     const val = this.map.get(key);
 7     if (val) {
 8 -     this.map.delete(key);
 9 -     this.map.set(key, val); // slow re-allocation
10     }
11     return val;
12   }
13 }

cache_optimized.ts (AI Refactored)

O(1) Time

 1 export class FastTTLCache<K, V> {
 2   private readonly cache = new Map<K, { val: V; exp: number }>();
 3 + constructor(private readonly maxCap: number, private readonly ttlMs: number) {}
 4 
 5 + get(key: K): V | undefined {
 6 +   const item = this.cache.get(key);
 7 +   if (!item) return undefined;
 8 +   if (Date.now() > item.exp) {
 9 +     this.cache.delete(key);
10 +     return undefined;
11 +   }
12 +   return item.val;
13 + }
14 }