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Optimize CPU and GPU usage while watching YouTube videos
// ==UserScript==
// @name YouTube CPU-Tamer Upgrade
// @version 0.3
// @description Optimize CPU and GPU usage while watching YouTube videos
// @author AstralRift
// @namespace https://greasyfork.org/users/1300060
// @match *://*.youtube.com/*
// @match *://*.youtube-nocookie.com/embed/*
// @match *://music.youtube.com/*
// @exclude *://*.youtube.com/*/*.{txt,png,jpg,jpeg,gif,xml,svg,manifest,log,ini}
// @run-at document-start
// @grant none
// @license MIT
// ==/UserScript==
(function () {
'use strict';
const win = this instanceof Window ? this : window;
const scriptKey = 'YTB_CPUTamer_AstralRift';
if (win[scriptKey]) throw new Error('Duplicated Userscript Calling');
win[scriptKey] = true;
const PromiseConstructor = function (executor) {
return new Promise(executor);
};
const ExternalPromise = (function () {
let resolve_, reject_;
const handler = function (resolve, reject) {
resolve_ = resolve;
reject_ = reject;
};
const PromiseExternal = function (cb) {
cb = cb || handler;
const promise = new PromiseConstructor(cb);
if (cb === handler) {
promise.resolve = resolve_;
promise.reject = reject_;
}
return promise;
};
return PromiseExternal;
})();
const checkGPUAcceleration = (function () {
try {
const canvas = document.createElement('canvas');
return !!(canvas.getContext('webgl') || canvas.getContext('experimental-webgl'));
} catch (e) {
return false;
}
})();
if (!checkGPUAcceleration) {
throw new Error('Your browser does not support GPU Acceleration. YouTube CPU-Tamer is skipped.');
}
const getTimeUpdate = (function () {
window.lastTimeUpdate = 1;
document.addEventListener('timeupdate', function () {
window.lastTimeUpdate = Date.now();
}, true);
let topLastTimeUpdate = -1;
try {
topLastTimeUpdate = top.lastTimeUpdate;
} catch (e) { }
return topLastTimeUpdate >= 1 ? function () { return top.lastTimeUpdate; } : function () { return window.lastTimeUpdate; };
})();
const initializeContext = function (win) {
return new PromiseConstructor(function (resolve) {
const waitForFrame = requestAnimationFrame;
let maxRetries = 16;
const frameId = 'vanillajs-iframe-v1';
let frame = document.getElementById(frameId);
let removeFrame = null;
if (!frame) {
frame = document.createElement('iframe');
frame.id = frameId;
const blobURL = typeof webkitCancelAnimationFrame === 'function' && typeof kagi === 'undefined' ? (frame.src = URL.createObjectURL(new Blob([], { type: 'text/html' }))) : null;
frame.sandbox = 'allow-same-origin';
let noscriptElement = document.createElement('noscript');
noscriptElement.appendChild(frame);
(function waitForDocument() {
if (!document.documentElement && maxRetries-- > 0) {
return new PromiseConstructor(waitForFrame).then(waitForDocument);
}
const root = document.documentElement;
root.appendChild(noscriptElement);
if (blobURL) PromiseConstructor.resolve().then(function () { URL.revokeObjectURL(blobURL); });
removeFrame = function (setTimeout) {
const removeFrameWhenReady = function (e) {
if (e) win.removeEventListener("DOMContentLoaded", removeFrameWhenReady, false);
e = noscriptElement;
noscriptElement = win = removeFrame = 0;
if (setTimeout) {
setTimeout(function () { e.remove(); }, 200);
} else {
e.remove();
}
};
if (!setTimeout || document.readyState !== 'loading') {
removeFrameWhenReady();
} else {
win.addEventListener("DOMContentLoaded", removeFrameWhenReady, false);
}
};
})();
}
(function waitForFrameContext() {
if (!frame.contentWindow && maxRetries-- > 0) {
return new PromiseConstructor(waitForFrame).then(waitForFrameContext);
}
const frameContext = frame.contentWindow;
if (!frameContext) throw new Error('window is not found.');
try {
const { requestAnimationFrame, setInterval, setTimeout, clearInterval, clearTimeout } = frameContext;
const boundFunctions = { requestAnimationFrame, setInterval, setTimeout, clearInterval, clearTimeout };
for (let key in boundFunctions) boundFunctions[key] = boundFunctions[key].bind(win);
if (removeFrame) PromiseConstructor.resolve(boundFunctions.setTimeout).then(removeFrame);
resolve(boundFunctions);
} catch (e) {
if (removeFrame) removeFrame();
resolve(null);
}
})();
});
};
initializeContext(win).then(function (context) {
if (!context) return null;
const { requestAnimationFrame, setTimeout, setInterval, clearTimeout, clearInterval } = context;
let animationFrameInterrupter = null;
const createRAFHelper = function () {
const animationElement = document.createElement('a-f');
if (!('onanimationiteration' in animationElement)) {
return function (resolve) {
animationFrameInterrupter = resolve;
requestAnimationFrame(resolve);
};
}
animationElement.id = 'a-f';
let animationQueue = null;
animationElement.onanimationiteration = function () {
if (animationQueue !== null) {
animationQueue();
animationQueue = null;
}
};
if (!document.getElementById('afscript')) {
const style = document.createElement('style');
style.id = 'afscript';
style.textContent = `
@keyFrames aF1 {
0% { order: 0; }
100% { order: 1; }
}
#a-f[id] {
visibility: collapse !important;
position: fixed !important;
display: block !important;
top: -100px !important;
left: -100px !important;
margin: 0 !important;
padding: 0 !important;
outline: 0 !important;
border: 0 !important;
z-index: -1 !important;
width: 0px !important;
height: 0px !important;
contain: strict !important;
pointer-events: none !important;
animation: 1ms steps(2, jump-none) 0ms infinite alternate forwards running aF1 !important;
}
`;
(document.head || document.documentElement).appendChild(style);
}
document.documentElement.insertBefore(animationElement, document.documentElement.firstChild);
return function (resolve) {
animationQueue = resolve;
animationFrameInterrupter = resolve;
};
};
const rafHelper = createRAFHelper();
(function () {
let afPromisePrimary, afPromiseSecondary;
afPromisePrimary = afPromiseSecondary = { resolved: true };
let afIndex = 0;
const resolveRAF = function (rafPromise) {
return new PromiseConstructor(function (resolve) {
rafHelper(resolve);
}).then(function () {
rafPromise.resolved = true;
const time = ++afIndex;
if (time > 9e9) afIndex = 9;
rafPromise.resolve(time);
return time;
});
};
const executeRAF = function () {
return new PromiseConstructor(function (resolve) {
const pendingPrimary = !afPromisePrimary.resolved ? afPromisePrimary : null;
const pendingSecondary = !afPromiseSecondary.resolved ? afPromiseSecondary : null;
let time = 0;
if (pendingPrimary && pendingSecondary) {
resolve(PromiseConstructor.all([pendingPrimary, pendingSecondary]).then(function (times) {
const t1 = times[0];
const t2 = times[1];
time = t1 > t2 && t1 - t2 < 8e9 ? t1 : t2;
return time;
}));
} else {
const newPrimary = !pendingPrimary ? (afPromisePrimary = new ExternalPromise()) : null;
const newSecondary = !pendingSecondary ? (afPromiseSecondary = new ExternalPromise()) : null;
const executeSecondary = function () {
if (newPrimary) {
resolveRAF(newPrimary).then(function (t) {
time = t;
if (newSecondary) {
resolveRAF(newSecondary).then(function (t2) {
time = t2;
resolve(time);
});
} else {
resolve(time);
}
});
} else if (newSecondary) {
resolveRAF(newSecondary).then(function (t) {
time = t;
resolve(time);
});
} else {
resolve(time);
}
};
if (pendingSecondary) {
pendingSecondary.then(function () {
executeSecondary();
});
} else if (pendingPrimary) {
pendingPrimary.then(function () {
executeSecondary();
});
} else {
executeSecondary();
}
}
});
};
const executingTasks = new Set();
const wrapFunction = function (handler, store) {
return function () {
const currentTime = Date.now();
if (currentTime - getTimeUpdate() < 800 && currentTime - store.lastTime < 800) {
const id = store.id;
executingTasks.add(id);
executeRAF().then(function (time) {
const isNotRemoved = executingTasks.delete(id);
if (!isNotRemoved || time === store.lastExecution) return;
store.lastExecution = time;
store.lastTime = currentTime;
handler();
});
} else {
store.lastTime = currentTime;
handler();
}
};
};
const createFunctionWrapper = function (originalFunction) {
return function (func, ms) {
if (ms === undefined) ms = 0;
if (typeof func === 'function') {
const store = { lastTime: Date.now() };
const wrappedFunc = wrapFunction(func, store);
store.id = originalFunction(wrappedFunc, ms);
return store.id;
} else {
return originalFunction(func, ms);
}
};
};
win.setTimeout = createFunctionWrapper(setTimeout);
win.setInterval = createFunctionWrapper(setInterval);
const clearFunctionWrapper = function (originalFunction) {
return function (id) {
if (id) executingTasks.delete(id) || originalFunction(id);
};
};
win.clearTimeout = clearFunctionWrapper(clearTimeout);
win.clearInterval = clearFunctionWrapper(clearInterval);
try {
win.setTimeout.toString = setTimeout.toString.bind(setTimeout);
win.setInterval.toString = setInterval.toString.bind(setInterval);
win.clearTimeout.toString = clearTimeout.toString.bind(clearTimeout);
win.clearInterval.toString = clearInterval.toString.bind(clearInterval);
} catch (e) { console.warn(e); }
})();
let intervalInterrupter = null;
setInterval(function () {
if (intervalInterrupter === animationFrameInterrupter) {
if (intervalInterrupter !== null) {
animationFrameInterrupter();
intervalInterrupter = null;
}
} else {
intervalInterrupter = animationFrameInterrupter;
}
}, 125);
});
})();