@550w-tools/core/lib/utils/qps.js

550w-tools 核心库，暴露若干API供应用层调用

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.QPSTimer = exports.getEachMinTimeByQPS = void 0;
// 根据QPS计算出一次任务至少需要执行多久
function getEachMinTimeByQPS(qps = 1) {
    return (1 / qps) * 1000;
}
exports.getEachMinTimeByQPS = getEachMinTimeByQPS;
/**
 * @description QPS限制任务时间管理器
 */
class QPSTimer {
    static getEachMinTimeByQPS(qps = 1) {
        return (1 / qps) * 1000;
    }
    constructor(qps) {
        this.qps = qps;
        this.eachMinTime = getEachMinTimeByQPS(qps);
    }
    // 任务开始前调用开始计时
    start() {
        this.startTime = Date.now();
        // 简化使用
        return this;
    }
    // 等待QPS限制下的剩余时长
    async wait() {
        const takesTime = Date.now() - this.startTime;
        // 任务执行完成后剩余等待时长
        const waitTime = this.eachMinTime - takesTime;
        if (waitTime > 0) {
            await new Promise((r) => setTimeout(r, waitTime));
        }
        return waitTime;
    }
}
exports.QPSTimer = QPSTimer;
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