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Universal HTML5 Speed Hack (speed up every site)

change the speed of the site. works on every site (performance.now, Date.now, setTimeout, requestAnimationFrame)

Verze ze dne 27. 07. 2025. Zobrazit nejnovější verzi.

// ==UserScript==
// @name         Universal HTML5 Speed Hack (speed up every site)
// @namespace    https://chat.openai.com/
// @version      1.11
// @description  change the speed of the site. works on every site (performance.now, Date.now, setTimeout, requestAnimationFrame)
// @author       kuba; i did use chatgpt for this though
// @match        *://*/*
// @grant        none
// @run-at       document-end
// @license MIT
// ==/UserScript==

(function () {
    'use strict';

    let speed = 1.0;

    function injectSpeedHack(win) {
        try {
            const script = win.document.createElement('script');
            script.textContent = `(() => {
                const realPerfNow = performance.now.bind(performance);
                const realDateNow = Date.now;
                const realSetTimeout = window.setTimeout;
                const realRAF = window.requestAnimationFrame;
                const start = realPerfNow();
                window.__speedHack = ${speed};

                performance.now = () => start + (realPerfNow() - start) * window.__speedHack;
                Date.now = () => realDateNow() * window.__speedHack;
                window.setTimeout = (fn, delay, ...args) => realSetTimeout(fn, delay / window.__speedHack, ...args);
                window.requestAnimationFrame = (cb) => realRAF(t => cb(t * window.__speedHack));

                console.log('[SpeedHack] Active at ' + window.__speedHack + 'x');
            })();`;
            win.document.documentElement.appendChild(script);
        } catch (e) {
            console.warn('[SpeedHack] Injection failed:', e);
        }
    }

    function updateSpeed(newSpeed) {
        speed = newSpeed;
        const win = window;
        win.__speedHack = speed;
        injectSpeedHack(win);
        for (const frame of document.querySelectorAll("iframe")) {
            try {
                frame.contentWindow.__speedHack = speed;
                injectSpeedHack(frame.contentWindow);
            } catch (e) {
                // Ignore cross-origin
            }
        }
    }

    function addSpeedControlUI() {
        const ui = document.createElement("div");
        ui.style.position = "fixed";
        ui.style.top = "10px";
        ui.style.right = "10px";
        ui.style.padding = "10px";
        ui.style.background = "rgba(0,0,0,0.7)";
        ui.style.color = "white";
        ui.style.zIndex = 999999;
        ui.style.borderRadius = "8px";
        ui.style.fontSize = "14px";
        ui.style.fontFamily = "sans-serif";
        ui.innerHTML = `
            <label style="display:block;">Speed: <span id="speedVal">${speed.toFixed(2)}x</span></label>
            <input type="range" id="speedSlider" min="0.1" max="5" value="${speed}" step="0.1" style="width:150px;">
        `;
        document.body.appendChild(ui);

        const slider = ui.querySelector("#speedSlider");
        const valText = ui.querySelector("#speedVal");

        slider.addEventListener("input", () => {
            const val = parseFloat(slider.value);
            valText.textContent = val.toFixed(2) + "x";
            updateSpeed(val);
        });
    }

    // Initialize on current window and all same-origin iframes
    function initialize() {
        injectSpeedHack(window);
        for (const frame of document.querySelectorAll("iframe")) {
            try {
                injectSpeedHack(frame.contentWindow);
            } catch (e) {
                // Cross-origin iframe – ignore
            }
        }
        addSpeedControlUI();
    }

    // Wait a bit for page to stabilize
    setTimeout(initialize, 500);
})();