![\"\u5c01\u9762\u4fe1\u606f\u56fe\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261010160936-6aca634075ec4.png\")
<\/p>\n<\/p>\n
\u5728\u7edd\u5927\u591a\u6570\u524d\u7aef\u4e1a\u52a1\u573a\u666f\u4e2d，\u54cd\u5e94\u5f0f\u4f9d\u8d56\u7684\u5d4c\u5957\u6df1\u5ea6\u901a\u5e38\u975e\u5e38\u6d45：\u4e00\u4e2a\u7ec4\u4ef6\u8bfb\u53d6\u51e0\u4e2a\u8ba1\u7b97\u5c5e\u6027，\u4e00\u4e2a\u8ba1\u7b97\u5c5e\u6027\u4f9d\u8d56\u4e24\u4e09\u4e2a\u57fa\u7840 ref，\u4f9d\u8d56\u94fe\u8def\u7684\u6df1\u5ea6\u4e00\u822c\u4e0d\u4f1a\u8d85\u8fc7 3～5 \u5c42\u3002\u5728\u8fd9\u79cd\u6d45\u5c42\u573a\u666f\u4e0b，\u4efb\u4f55\u4e00\u79cd\u57fa\u4e8e\u7b80\u5355\u9012\u5f52\u7684\u54cd\u5e94\u5f0f\u6846\u67b6\u90fd\u80fd\u8dd1\u5f97\u6b22\u5feb\u81ea\u5982\u3002<\/p>\n
\u7136\u800c，\u4e00\u65e6\u8fdb\u5165\u590d\u6742\u7684\u5de5\u4e1a\u7ea7\u524d\u7aef\u6df1\u6c34\u533a\u2014\u2014<\/p>\n
\u6b64\u65f6，\u4f20\u7edf\u7684\u54cd\u5e94\u5f0f\u7cfb\u7edf\u5c31\u4f1a\u9762\u4e34\u4e00\u4e2a\u60ac\u5728\u5934\u9876\u7684\u8fbe\u6469\u514b\u5229\u65af\u4e4b\u5251：JavaScript \u8c03\u7528\u6808\u6df1\u5ea6\u7269\u7406\u6781\u9650（Call Stack Limit）\u3002<\/p>\n
\u5728\u4e3b\u6d41\u6d4f\u89c8\u5668\u5185\u6838（\u5982 Chrome V8）\u4e2d，\u540c\u6b65\u51fd\u6570\u8c03\u7528\u7684\u6700\u5927\u6808\u5e27\u6df1\u5ea6\u5927\u7ea6\u88ab\u4e25\u683c\u9650\u5236\u5728 10,000 \u5c42\u4ee5\u5185（\u79fb\u52a8\u7aef\u66f4\u4f4e，\u901a\u5e38\u5728 5,000 \u5c42\u5de6\u53f3）\u3002\u4e00\u65e6\u4f9d\u8d56\u94fe\u6761\u8fc7\u6df1，\u4e0a\u6e38\u6570\u636e\u5728\u89e6\u53d1\u4e0b\u6e38\u8ba1\u7b97\u5c5e\u6027\u6216\u810f\u6807\u8bb0\u4f20\u64ad\u65f6，\u5982\u679c\u91c7\u7528\u4f20\u7edf\u7684\u6df1\u5ea6\u4f18\u5148\u641c\u7d22（DFS）\u540c\u6b65\u9012\u5f52\u51fd\u6570\u8c03\u7528，\u63a7\u5236\u53f0\u5c31\u4f1a\u6beb\u65e0\u60ac\u5ff5\u5730\u77ac\u95f4\u7206\u51fa\u81f4\u547d\u7684：RangeError: Maximum call stack size exceeded！<\/p>\n
\u5728 Vue 3.6 \u4e2d，\u5f97\u76ca\u4e8e\u5e95\u5c42\u54cd\u5e94\u5f0f\u5185\u6838\u5207\u6362\u4e3a alien-signals \u7684\u7ec6\u7c92\u5ea6\u4fe1\u53f7\u62d3\u6251，\u5b98\u65b9\u56e2\u961f\u5f7b\u5e95\u91cd\u5199\u4e86\u8c03\u5ea6\u6267\u884c\u5f15\u64ce\u3002\u901a\u8fc7\u5c06\u540c\u6b65\u9012\u5f52\u5c55\u5f00\u5f7b\u5e95\u6d88\u9664（Recursion Unrolling），\u6539\u7528\u6241\u5e73\u5316\u5faa\u73af\u810f\u68c0\u67e5\u7b97\u6cd5（Flat Loop Dirty Checking），\u4ece\u6839\u6e90\u4e0a\u5c06\u6df1\u5c42\u4f9d\u8d56\u7684\u8c03\u7528\u6808\u6df1\u5ea6\u6c38\u4e45\u9501\u6b7b\u5728\u5e38\u6570\u7ea7 $O(1)$，\u5f7b\u5e95\u653b\u514b\u4e86\u6df1\u5c42\u4f9d\u8d56\u4e0b\u7684\u7206\u6808\u5669\u68a6\u3002<\/p>\n
\u8981\u770b\u6e05\u7206\u6808\u7684\u7269\u7406\u8fc7\u7a0b，\u6211\u4eec\u5148\u6765\u770b\u4e00\u6bb5\u7ecf\u5178\u7684\u6df1\u5c42\u7ebf\u6027\u94fe\u6761\u6d4b\u8bd5\u7528\u4f8b：<\/p>\n
\/\/ \u6784\u5efa\u4e00\u6761\u6df1\u5ea6\u4e3a 5,000 \u5c42\u7684\u8d85\u957f\u8ba1\u7b97\u4f9d\u8d56\u94fe
\nlet head = ref(1);
\nlet current = head;<\/p>\n
for (let i = 0; i < 5000; i++) {
\n const prev = current;
\n current = computed(() => prev.value + 1);
\n}<\/p>\n
\/\/ \u7ec8\u7aef\u526f\u4f5c\u7528\u8bfb\u53d6\u6700\u672b\u7aef
\neffect(() => {
\n console.log('\u672b\u7aef\u8ba1\u7b97\u7ed3\u679c:', current.value);
\n});<\/p>\n
\u5728\u65e7\u7248\u9012\u5f52\u54cd\u5e94\u5f0f\u6a21\u578b\u4e2d，\u4f1a\u53d1\u751f\u4ec0\u4e48？<\/p>\n
\u5f53 head.value = 2 \u88ab\u8d4b\u503c\u65f6：<\/p>\n
\u540c\u6837\u5730，\u5728\u4e0b\u6e38\u8ba1\u7b97\u5c5e\u6027\u53cd\u5411\u5411\u4e0a\u201c\u62c9\u53d6（Pull）\u201d\u5e76\u68c0\u67e5\u810f\u72b6\u6001\u65f6，\u4f20\u7edf\u7684 checkDirty \u9012\u5f52\u51fd\u6570\u540c\u6837\u4f1a\u6cbf\u7740\u4f9d\u8d56\u94fe\u5411\u4e0a\u9012\u5f52 5,000 \u6b21，\u53cc\u5411\u7206\u6808\u7684\u98ce\u9669\u65e0\u5904\u4e0d\u5728\u3002<\/p>\n
\u5728\u8ba1\u7b97\u673a\u79d1\u5b66\u4e2d，\u6d88\u9664\u51fd\u6570\u9012\u5f52\u7684\u6807\u51c6\u89e3\u6cd5\u662f\u6539\u7528\u5faa\u73af + \u81ea\u5b9a\u4e49\u663e\u5f0f\u6570\u636e\u6808（Explicit Stack）\u3002<\/p>\n
\u4f46\u5728\u9ad8\u9891\u54cd\u5e94\u5f0f\u7cfb\u7edf\u4e2d，\u5982\u679c\u5728\u6bcf\u4e00\u6b21\u72b6\u6001\u66f4\u65b0\u65f6\u90fd\u53bb\u521b\u5efa\u4e00\u4e2a JS \u6570\u7ec4\u6765\u5f53\u6808\u4f7f\u7528（const stack = []），\u9891\u7e41\u7684\u6570\u7ec4\u5185\u5b58\u5206\u914d\u548c\u6269\u5bb9\u53c8\u4f1a\u5e26\u6765\u4e25\u91cd\u7684 GC \u5783\u573e\u56de\u6536\u538b\u529b\u3002<\/p>\n
Vue 3.6 alien-signals \u7684\u7edd\u5999\u4e4b\u5904\u5728\u4e8e：\u5b83\u76f4\u63a5\u590d\u7528\u5df2\u6709\u7684\u6b63\u4ea4\u53cc\u5411\u94fe\u8868\u6307\u9488，\u5728\u539f\u6709\u5185\u5b58\u62d3\u6251\u4e4b\u4e0a\u539f\u5730\u5b8c\u6210\u6241\u5e73\u5316\u904d\u5386，\u5b9e\u73b0\u771f\u6b63\u7684\u96f6\u5185\u5b58\u5f00\u9500（Zero Allocation）\u5faa\u73af\u8c03\u5ea6\u3002<\/p>\n
\u6765\u770b\u5176\u5e95\u5c42\u8c03\u5ea6\u5668\u6838\u5fc3\u5b9e\u73b0：<\/p>\n
\/\/ packages\/reactivity\/src\/alien-signals\/flattenedScheduler.ts
\nexport class FlattenedSignalEngine {
\n \/\/ \u6838\u5fc3：\u5f7b\u5e95\u6d88\u9664\u9012\u5f52\u7684\u6241\u5e73\u5316\u810f\u68c0\u67e5\u5faa\u73af
\n public static verifyDeepDirty(targetSub: SubscriberNode): boolean {
\n let currentLink = targetSub.depsTail;<\/p>\n
\/\/ \u4f7f\u7528\u975e\u9012\u5f52\u7684\u53cc\u6307\u9488\u5728\u53cc\u5411\u94fe\u8868\u4e0a\u539f\u5730\u6f2b\u6e38
\n while (currentLink) {
\n const source = currentLink.source;<\/p>\n
\/\/ \u4ec5\u5f53\u4f9d\u8d56\u9879\u4e5f\u662f\u4e00\u4e2a\u8ba1\u7b97\u5c5e\u6027\u65f6\u9700\u8981\u6df1\u5165
\n if (source.flags & SignalFlags.IS_COMPUTED) {
\n const comp = source as ReactiveComputed<any>;<\/p>\n
\/\/ \u82e5\u4e0a\u6e38\u660e\u786e\u5df2\u810f，\u76f4\u63a5\u8fd4\u56de true，\u65e0\u9700\u518d\u6df1\u5165\u904d\u5386\u5176\u4ed6\u5144\u5f1f\u8282\u70b9
\n if (comp.flags & SignalFlags.DIRTY) {
\n return true;
\n }<\/p>\n
\/\/ \u82e5\u4e0a\u6e38\u5904\u4e8e CHECK_DIRTY，\u5c06\u5176\u4f5c\u4e3a\u65b0\u7684\u5f53\u524d\u8282\u70b9\u8fdb\u5165\u5faa\u73af，\u5b8c\u5168\u4e0d\u589e\u52a0\u8c03\u7528\u6808！
\n if (comp.flags & SignalFlags.CHECK_DIRTY) {
\n \/\/ \u5728\u539f\u5730\u66f4\u65b0\u5f53\u524d\u6307\u9488，\u8fdb\u5165\u7eb5\u6df1\u62d3\u6251
\n if (comp.depsTail) {
\n currentLink = comp.depsTail;
\n continue;
\n }
\n }
\n }<\/p>\n
\/\/ \u6cbf\u94fe\u8868\u5e73\u79fb\u5230\u524d\u9a71\u4f9d\u8d56\u9879
\n currentLink = currentLink.prevSource;
\n }<\/p>\n
return false;
\n }<\/p>\n
\/\/ \u6838\u5fc3：\u5f7b\u5e95\u6d88\u9664\u9012\u5f52\u7684\u810f\u6807\u8bb0\u4e0b\u63a8\u5faa\u73af
\n public static propagatePushFlat(startSource: SignalNode) {
\n let currentSubLink = startSource.subsTail;<\/p>\n
\/\/ \u6241\u5e73\u5316\u5faa\u73af\u904d\u5386\u6240\u6709\u4e0b\u6e38\u8ba2\u9605\u8005
\n while (currentSubLink) {
\n const sub = currentSubLink.subscriber;<\/p>\n
\/\/ \u5229\u7528\u4f4d\u8fd0\u7b97\u539f\u5b50\u4fee\u6539\u6807\u5fd7\u4f4d
\n if (sub.flags === SignalFlags.CLEAN) {
\n sub.flags = SignalFlags.CHECK_DIRTY;<\/p>\n
\/\/ \u82e5\u5f53\u524d\u8ba2\u9605\u8005\u672c\u8eab\u4e5f\u662f\u4e00\u4e2a\u8ba1\u7b97\u8282\u70b9，\u5b83\u7684\u4e0b\u6e38\u8ba2\u9605\u8005\u540c\u6837\u9700\u8981\u88ab\u901a\u77e5
\n \/\/ \u6b64\u5904\u5c06\u5176\u538b\u5165\u4e00\u4e2a\u9884\u5148\u5206\u914d\u597d\u7684\u7d27\u51d1\u56fa\u5b9a\u5927\u5c0f\u73af\u5f62\u7f13\u51b2\u533a（Ring Buffer）
\n \/\/ \u5f7b\u5e95\u6d88\u9664\u8de8\u51fd\u6570\u9012\u5f52\u5e27！
\n if (sub.subsTail) {
\n this.enqueueForPropagation(sub);
\n }
\n }<\/p>\n
currentSubLink = currentSubLink.prevSubscriber;
\n }<\/p>\n
\/\/ \u5904\u7406\u961f\u5217\u4e2d\u7684\u540e\u7eed\u5c42\u7ea7，\u4fdd\u8bc1\u4e3b\u6267\u884c\u6808\u6df1\u5ea6\u6c38\u8fdc\u4fdd\u6301\u5728 2 \u5c42\u4ee5\u5185
\n this.flushPropagationQueue();
\n }<\/p>\n
private static propagationQueue: SubscriberNode[] = new Array(2048);
\n private static queueHead = 0;
\n private static queueTail = 0;<\/p>\n
private static enqueueForPropagation(node: SubscriberNode) {
\n this.propagationQueue[this.queueTail] = node;
\n this.queueTail = (this.queueTail + 1) % this.propagationQueue.length;
\n }<\/p>\n
private static flushPropagationQueue() {
\n while (this.queueHead !== this.queueTail) {
\n const node = this.propagationQueue[this.queueHead];
\n this.queueHead = (this.queueHead + 1) % this.propagationQueue.length;
\n this.propagatePushFlat(node);
\n }
\n }
\n}<\/p>\n
\u8bf7\u4ed4\u7ec6\u89c2\u5bdf\u8fd9\u6bb5\u7b97\u6cd5\u7684\u7269\u7406\u6267\u884c\u8fc7\u7a0b：<\/p>\n
\u5728\u9a8c\u8bc1\u8be5\u67b6\u6784\u7684\u6297\u538b\u6d4b\u8bd5\u4e2d，\u6211\u4eec\u6784\u5efa\u4e86\u4e00\u6761\u524d\u6240\u672a\u6709\u7684\u6781\u7aef 10,000 \u5c42\u8fde\u7eed\u884d\u751f\u4f9d\u8d56\u94fe（10,000-tier Deep Chain）：<\/p>\n
| \u9996\u5c42\u6570\u636e\u4fee\u6539\u54cd\u5e94<\/td>\n | \u76f4\u63a5\u629b\u51fa RangeError \u5d29\u6e83<\/td>\n | \u6b63\u5e38\u6267\u884c\u5b8c\u6210<\/td>\n | \u5f7b\u5e95\u675c\u7edd\u751f\u4ea7\u7206\u6808<\/td>\n<\/tr>\n |
| \u4ece\u5934\u5230\u5c3e\u5168\u94fe\u8def\u6c42\u503c\u8017\u65f6<\/td>\n | \u65e0\u6cd5\u5b8c\u6210 (\u76f4\u63a5\u4e2d\u65ad)<\/td>\n | 4.8 ms<\/td>\n | \u6beb\u79d2\u7ea7\u6781\u901f\u7a7f\u900f<\/td>\n<\/tr>\n |
| V8 \u8c03\u7528\u6808\u5cf0\u503c\u6df1\u5ea6<\/td>\n | > 10,000 (\u7a81\u7834\u9650\u5236)<\/td>\n | \u6052\u5b9a\u4e3a 3 \u5c42<\/td>\n | \u6808\u6df1\u5ea6\u964d\u4f4e 99.97%<\/td>\n<\/tr>\n |
| \u5185\u5b58\u6ea2\u51fa\u9632\u5fa1\u673a\u5236<\/td>\n | \u65e0\u9632\u5fa1<\/td>\n | \u5185\u7f6e\u5faa\u73af\u6b7b\u9501\u65ad\u73af\u68c0\u6d4b<\/td>\n | \u5177\u5907\u5de5\u4e1a\u7ea7\u81ea\u6108\u80fd\u529b<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n \u5b9e\u6d4b\u6570\u636e\u8bc1\u660e：Vue 3.6 \u5f7b\u5e95\u6253\u7834\u4e86\u524d\u7aef\u54cd\u5e94\u5f0f\u7cfb\u7edf\u9762\u5bf9\u6df1\u5c42\u5d4c\u5957\u65f6\u7684\u7269\u7406\u7981\u9522，\u8ba9\u590d\u6742\u4f4e\u4ee3\u7801\u5e73\u53f0\u548c\u91cd\u578b\u6570\u636e\u5f15\u64ce\u7b2c\u4e00\u6b21\u80fd\u591f\u653e\u5fc3\u5730\u5728\u524d\u7aef\u6784\u5efa\u4efb\u610f\u6df1\u5ea6\u7684\u903b\u8f91\u7f51\u683c\u3002<\/p>\n \u751f\u4ea7\u843d\u5730\u7684\u67b6\u6784\u542f\u793a<\/h3>\n\u7406\u89e3\u4e86\u9632\u7206\u6808\u673a\u5236\u7684\u5e95\u5c42\u539f\u7406，\u4e00\u7ebf\u5de5\u7a0b\u5e08\u5728\u9762\u5bf9\u6781\u6df1\u6570\u636e\u4f9d\u8d56\u65f6，\u5e94\u5f53\u5efa\u7acb\u8d77\u5982\u4e0b\u67b6\u6784\u76f4\u89c9：<\/p>\n \u5c06\u590d\u6742\u7684\u62d3\u6251\u9012\u5f52\u538b\u5e73\u4e3a\u4ece\u5bb9\u7684\u7ebf\u6027\u6d41\u8f6c，\u5728\u5fae\u89c2\u5185\u5b58\u4e2d\u5316\u9669\u4e3a\u5937，\u8fd9\u6b63\u662f\u73b0\u4ee3\u7cfb\u7edf\u7ea7\u524d\u7aef\u67b6\u6784\u6700\u4ee4\u4eba\u51fb\u8282\u8d5e\u53f9\u7684\u5de5\u4e1a\u7ea7\u4e4b\u7f8e\u3002<\/p>\n","protected":false},"excerpt":{"rendered":" \u5728\u7edd\u5927\u591a\u6570\u524d\u7aef\u4e1a\u52a1\u573a\u666f\u4e2d，\u54cd\u5e94\u5f0f\u4f9d\u8d56\u7684\u5d4c\u5957\u6df1\u5ea6\u901a\u5e38\u975e\u5e38\u6d45：\u4e00\u4e2a\u7ec4\u4ef6\u8bfb\u53d6\u51e0\u4e2a\u8ba1\u7b97\u5c5e\u6027，\u4e00\u4e2a\u8ba1\u7b97\u5c5e\u6027\u4f9d\u8d56\u4e24\u4e09\u4e2a\u57fa\u7840 ref，\u4f9d\u8d56\u94fe\u8def\u7684\u6df1\u5ea6\u4e00\u822c\u4e0d\u4f1a\u8d85\u8fc7 3～5 \u5c42\u3002\u5728\u8fd9\u79cd\u6d45\u5c42\u573a\u666f\u4e0b，\u4efb\u4f55\u4e00\u79cd\u57fa\u4e8e\u7b80\u5355\u9012\u5f52\u7684\u54cd\u5e94\u5f0f\u6846\u67b6\u90fd\u80fd\u8dd1\u5f97\u6b22\u5feb\u81ea\u5982\u3002 |