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57 lines
1.5 KiB
57 lines
1.5 KiB
import { game, Game } from 'cc';
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/**
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* 前台活跃时长计时器：切后台暂停累计，用于 PF 加载耗时（排除挂起脏数据）。
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*/
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export class PerfLoadTimer {
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private readonly _wallStart = Date.now();
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private _fgStart = 0;
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private _fgTotal = 0;
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private _listening = false;
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static start(): PerfLoadTimer {
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const timer = new PerfLoadTimer();
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timer._resumeFg();
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timer._listening = true;
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game.on(Game.EVENT_HIDE, timer._onHide, timer);
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game.on(Game.EVENT_SHOW, timer._onShow, timer);
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return timer;
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}
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/** 前台累计毫秒（100ms 粒度取整由 PerfReport 负责） */
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foregroundMs(): number {
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return this._fgTotal + (this._fgStart > 0 ? Date.now() - this._fgStart : 0);
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}
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/** 墙钟毫秒（用于判定是否因后台挂起导致失真） */
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wallMs(): number {
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return Date.now() - this._wallStart;
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}
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dispose(): void {
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if (!this._listening) return;
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game.off(Game.EVENT_HIDE, this._onHide, this);
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game.off(Game.EVENT_SHOW, this._onShow, this);
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this._pauseFg();
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this._listening = false;
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}
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private _onHide(): void {
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this._pauseFg();
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}
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private _onShow(): void {
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this._resumeFg();
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}
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private _pauseFg(): void {
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if (this._fgStart <= 0) return;
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this._fgTotal += Date.now() - this._fgStart;
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this._fgStart = 0;
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}
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private _resumeFg(): void {
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if (this._fgStart > 0) return;
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this._fgStart = Date.now();
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}
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}
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