Timer Accelerator (Testing & Debugging Tool)

Speeds up client-side timers for development, testing, and educational purposes.

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// ==UserScript==
// @name         Timer Accelerator (Testing & Debugging Tool)
// @namespace    https://github.com/hgcfkuyfliyfl/
// @version      2.1
// @description  Speeds up client-side timers for development, testing, and educational purposes.
// @author       Wisdom Ng'oma
// @license      MIT
// @match        *://*/*
// @run-at       document-start
// @grant        none
// ==/UserScript==

(function() {
    'use strict';

    const SPEED_FACTOR = 100;
    let startTime = Date.now();
    let performanceStart = performance.now();

    // Override Date.now
    const originalDateNow = Date.now;
    Date.now = function() {
        return startTime + (originalDateNow() - startTime) * SPEED_FACTOR;
    };

    // Override performance.now
    const originalPerformanceNow = performance.now;
    performance.now = function() {
        return performanceStart + (originalPerformanceNow() - performanceStart) * SPEED_FACTOR;
    };

    // Override timers
    const originalSetTimeout = window.setTimeout;
    const originalSetInterval = window.setInterval;

    window.setTimeout = function(callback, delay, ...args) {
        return originalSetTimeout(callback, Math.max(1, delay / SPEED_FACTOR), ...args);
    };

    window.setInterval = function(callback, delay, ...args) {
        return originalSetInterval(callback, Math.max(1, delay / SPEED_FACTOR), ...args);
    };

    console.log(`Time Accelerator Active: ${SPEED_FACTOR}x`);
})();