Run results for: Custom Event vs PubSub Single Event

Run details:

User agent: Mozilla/5.0 (Linux; U; Android 14; zh-CN; V2118A Build/UP1A.231005.007) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/100.0.4896.58 UWS/5.12.4.0 Mobile Safari/537.36 AliApp(DingTalk/7.6.10.4) com.alibaba.android.rimet.aliding/PIS616957032125768704 Channel/exclusive_dingtalk_21001 language/zh-CN 2ndType/exclusive abi/64 xpn/vivo UT4Aplus/0.2.25 colorScheme/light

Browser: Chrome 100

Operating system: Android

Device Platform: Mobile

Date tested: 5 days ago

Test name	Executions per second
Custom Event	231.2 Ops/sec
PubSub	20542.4 Ops/sec

Tests:

Custom Event
let i = 1001; const results = []; while (--i) { window.dispatchEvent(new CustomEvent('custom:test')); }
PubSub
class PubSub { constructor() { this.events = {}; } subscribe(event, callback) { if (!this.events.hasOwnProperty(event)) { this.events[event] = []; } return this.events[event].push(callback); } publish(event, data = {}) { if (!this.events.hasOwnProperty(event)) { return []; } return this.events[event].map((callback) => callback(data)); } } const pubSub = new PubSub(); let i = 1001; const results = []; while (--i) { pubSub.publish('custom', 'test') }