Method cleanupCache

packages/core/src/ECS/Core/QuerySystem.ts:691–722

* 清理缓存

()

     * 清理缓存
     */
    private cleanupCache(): void {
        // 移除过期的缓存条目
        const now = Date.now();
        for (const [key, entry] of this._queryCache.entries()) {
            if (now - entry.timestamp > this._cacheTimeout) {
                this._queryCache.delete(key);
            }
        }

        // 如果还是太满，移除最少使用的条目
        if (this._queryCache.size >= this._cacheMaxSize) {
            let minHitCount = Infinity;
            let oldestKey = '';
            let oldestTimestamp = Infinity;

            // 单次遍历找到最少使用或最旧的条目
            for (const [key, entry] of this._queryCache.entries()) {
                if (
                    entry.hitCount < minHitCount ||
                    (entry.hitCount === minHitCount && entry.timestamp < oldestTimestamp)
                ) {
                    minHitCount = entry.hitCount;
                    oldestKey = key;
                    oldestTimestamp = entry.timestamp;
                }
            }

            if (oldestKey) {
                this._queryCache.delete(oldestKey);
            }
        }
    }

    /**
     * 清除所有查询缓存