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YouTube Performance CPU Optimized v2.3

H.264 optimize, throttling yumuşatıldı, DOM ve Ambient iyileştirildi, lazy-load yorumlar

当前为 2025-08-31 提交的版本，查看 最新版本。

// ==UserScript==
// @name         YouTube Performance CPU Optimized v2.3
// @namespace    http://tampermonkey.net/
// @version      2.3.0
// @description  H.264 optimize, throttling yumuşatıldı, DOM ve Ambient iyileştirildi, lazy-load yorumlar
// @author       Sefa AVAN
// @license      MIT
// @match        http://*.youtube.com/*
// @match        http://youtube.com/*
// @match        https://*.youtube.com/*
// @match        https://youtube.com/*
// @run-at       document-start
// ==/UserScript==

(function () {
  'use strict';

  // ---------- 1) Codec override (AV1 kapalı, VP9 serbest) ----------
  const origCanPlayType = HTMLMediaElement.prototype.canPlayType;
  HTMLMediaElement.prototype.canPlayType = function (type) {
    if (type && /codecs="?av01/i.test(type)) return '';
    return origCanPlayType.call(this, type);
  };

  if (navigator.mediaCapabilities && navigator.mediaCapabilities.decodingInfo) {
    const origDecodingInfo = navigator.mediaCapabilities.decodingInfo.bind(navigator.mediaCapabilities);
    navigator.mediaCapabilities.decodingInfo = async (cfg) => {
      const ct = cfg?.video?.contentType || '';
      if (/codecs="?av01/i.test(ct)) return { supported: false, powerEfficient: false, smooth: false };
      return origDecodingInfo(cfg);
    };
  }

  // ---------- 2) Event throttling (yumuşatıldı) ----------
  function throttleEvents(root = document) {
    const throttleMs = 30; // 33Hz, daha akıcı
    const last = {};
    const types = ['mousemove', 'pointermove', 'scroll', 'resize'];

    types.forEach(type => {
      root.addEventListener(type, (e) => {
        const now = performance.now();
        if (last[type] && now - last[type] < throttleMs) {
          e.stopImmediatePropagation();
          e.stopPropagation();
          return;
        }
        last[type] = now;
      }, true);
    });
  }

  // ---------- 3) DOM hafifletme (IntersectionObserver rootMargin küçültüldü) ----------
  function slimDOM() {
    document.querySelectorAll('ytd-rich-item-renderer,ytd-compact-video-renderer')
      .forEach(el => {
        if (!el.dataset.cpuOptimized) {
          el.dataset.cpuOptimized = '1';
          el.style.display = "none";
          const observer = new IntersectionObserver((entries, obs) => {
            if (entries[0].isIntersecting) {
              el.style.display = "";
              obs.disconnect();
            }
          }, { rootMargin: '1000px' }); // daha küçük margin → daha hızlı yükleme
          observer.observe(el);
        }
      });
  }

  // ---------- 4) Ambient Mode kapatma (observer optimize edildi) ----------
  function killAmbient() {
    const style = document.createElement('style');
    style.textContent = `
      .ytp-ambient-light,
      .ytp-ambient-mode-enabled,
      ytd-watch-flexy[ambient-mode-enabled] .ytp-ambient-light,
      ytd-watch-flexy[ambient-mode-enabled] .html5-video-player::before {
        display: none !important;
        opacity: 0 !important;
        visibility: hidden !important;
      }
    `;
    document.documentElement.appendChild(style);

    let mo;
    const startAmbientObs = () => {
      if (mo) return; // birden fazla observer oluşturulmasın
      const flexy = document.querySelector('ytd-watch-flexy');
      if (flexy) {
        mo = new MutationObserver(() => {
          flexy.removeAttribute('ambient-mode-enabled');
        });
        mo.observe(flexy, { attributes: true, attributeFilter: ['ambient-mode-enabled'] });
      }
    };
    document.addEventListener('DOMContentLoaded', startAmbientObs);
    window.addEventListener('yt-navigate-finish', startAmbientObs);
  }

  // ---------- 5) Lazy-load yorumlar ----------
  function lazyLoadComments() {
    const comments = document.querySelector("ytd-comments#comments");
    if (!comments) return;
    comments.style.contentVisibility = "hidden";
    const obs = new IntersectionObserver((entries) => {
      if (entries[0].isIntersecting) {
        comments.style.contentVisibility = "visible";
        obs.disconnect();
      }
    });
    obs.observe(comments);
  }

  // ---------- 6) Apply ----------
  const reapply = () => {
    throttleEvents();
    slimDOM();
    killAmbient();
    lazyLoadComments();
  };

  document.addEventListener('DOMContentLoaded', reapply);
  window.addEventListener('yt-navigate-finish', reapply);
})();