【PerformanceMonitor】组件内存泄漏修复功能介绍（已弃用）

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function loadHandler() {
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    logOnce('页面加载完成');
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    scheduleUpdate();
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}
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window.addEventListener('load', loadHandler, { passive: true });

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function scheduleUpdate() {
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    if (isCleanup) return;
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    if (updateTimer) clearTimeout(updateTimer);
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    updateTimer = setTimeout(updatePerformance, 100);
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}

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if (typeof window.swup !== 'undefined' && window.swup.hooks) {
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    window.swup.hooks.on('content:replace', swupHandler);
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    swupCleanup = function() {
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        if (window.swup && window.swup.hooks) {
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            window.swup.hooks.off('content:replace', swupHandler);
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        }
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    };
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}

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const observer = new MutationObserver(function(mutations) {
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    for (let i = 0; i < mutations.length; i++) {
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        if (!document.contains(perfMonitor)) {
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            log('检测到组件移除');
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            cleanup();
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            observer.disconnect();
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            break;
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        }
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    }
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});
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observer.observe(document.body, { childList: true, subtree: true });

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function log(...args) {
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    if (!DEBUG) return;
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    const key = args.join(' ');
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    const now = Date.now();
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    const lastTime = lastLogTime.get(key) || 0;
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    if (now - lastTime < LOG_THROTTLE_MS) {
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        return;
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    }
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    lastLogTime.set(key, now);
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    console.log(LOG_PREFIX, ...args);
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}

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const DEBUG = true;

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const DEBUG = false;