// ==UserScript==// @name        Amazon CPU Tamer// @name:ja     Amazon CPU Tamer// @name:zh-CN  Amazon CPU Tamer// @namespace   knoa.jp// @description It reduces CPU usage on Amazon shopping pages. Enjoy your snappy shopping.// @description:ja AmazonのショッピングページでのCPU使用率を削減します。お買いものをサクサク楽しみましょう。// @description:zh-CN 减少Amazon购物页面上的CPU利用率。顺利地享受买东西吧。// @include     https://www.amazon.com/*// @include     https://www.amazon.co.jp/*// @include     https://www.amazon.co.uk/*// @include     https://www.amazon.es/*// @include     https://www.amazon.fr/*// @include     https://www.amazon.de/*// @include     https://www.amazon.it/*// @include     https://www.amazon.*// @include     https://*.amazon-*.com/*// @include     https://*.*-amazon.com/*// @exclude     */cart/*// @exclude     */buy/*// @version     1.4.4// @grant       none// @run-at      document-start// @antifeature referral-link This script may add an associate ID to visited Amazon URLs. It doesn't replace any existed ID. Thank you.// @antifeature:ja referral-link ありがとうございます。本スクリプトは、訪れたAmazonページのURLにアソシエイトIDを付与することがあります。別のIDがすでに付与されている場合は、置き換えることはしません。// @antifeature:zh-CN referral-link 本脚本可能会为访问过的Amazon页面的URL授予联盟ID。如果已经授予了另一个ID，则不会进行替换。谢谢。// @contributionURL https://paypal.me/kan####ikaku// ==/UserScript==/*[update]Update @antifeature descriptions. Minor fix.[memo]top:interval インタラクション要素にも使われるので、1インスタンスにまとめた上で前面タブのみやむなく125msごとに実行。もっとゆるい頻度にしつつ、click や  keydown 時のみ頻度を上げる手はあるが、前面タブで1-2%なら許されるだろう。ゆるい interval による把握できている問題は詳細画像の切り替え表示だけなので、自分でやっちゃう手もあるが。timeout  インタラクションのみで定常なしなので、そのまま実行してもよい。iframe(ad):interval 初期化時のみなのでそのまま実行してもよい。timeout  定常 100ms が iframe ごとに1つずつなので、1秒ごとに頻度を落とす。iframe(cloudfront.net ad)ローカルソースのiframeから事後生成されるのでTampermonkeyが機能しない。広告除去することはできるが、このスクリプトの役目ではない。*/(function(){const SCRIPTID = 'AmazonCpuTamer';console.log(SCRIPTID, location.href);const BUNDLEDINTERVAL    =     125;/* the bundled interval */const BACKGROUNDINTERVAL = 60*1000;/* take even longer interval on hidden tab */const IFRAMETIMEOUT      =  1*1000;/* amazon uses timeouts instead of intervals on iframes *//*[interval]tame quick intervals*/if(window === top){/* integrate each of intervals */const bundle = {};/* {0: {f, interval, lastExecution}} */let index = 0;/* use it instead of interval id */let lastExecution = 0;/* bundle intervals */const originalSetInterval = window.setInterval.bind(window);window.setInterval = function(f, interval, ...args){//console.log(SCRIPTID, 'original interval:', interval, location.href);bundle[index] = {f: f.bind(null, ...args),interval: interval,lastExecution: 0,};return index++;};window.clearInterval = function(id){//console.log(SCRIPTID, 'clearInterval:', id, location.href);delete bundle[id];};/* execute bundled intervals *//* a bunch of intervals does cost so much even if the processes do nothing */originalSetInterval(function(){const now = Date.now();if(document.hidden && now < lastExecution + BACKGROUNDINTERVAL) return;Object.keys(bundle).forEach(id => {const item = bundle[id];if(item === undefined) return;/* it could be occur on tiny deletion chance */if(now < item.lastExecution + item.interval) return;/* not yet */item.f();item.lastExecution = now;});lastExecution = now;}, BUNDLEDINTERVAL);}/*[timeout]tame quick timeouts on iframe ads*/if(window !== top){const originalSetTimeout = window.setTimeout.bind(window);window.setTimeout = function(f, timeout, ...args){if(document.hidden) return;if(timeout < IFRAMETIMEOUT){//console.log(SCRIPTID, 'timeout:', timeout, 'to', IFRAMETIMEOUT, location.href);timeout = IFRAMETIMEOUT;}return originalSetTimeout(f, timeout, ...args);};}/*[associate]add an associate tag*/if(window === top){const IDS = {'www.amazon.com':   'knoa-20','www.amazon.co.jp': 'knoa-22','www.amazon.co.uk': 'knoa01-21','www.amazon.es':    'knoa0c-21','www.amazon.fr':    'knoa09-21','www.amazon.de':    'knoa03-21','www.amazon.it':    'knoa0a-21',};if(IDS[location.host]){addTag(IDS[location.host]);}function addTag(tag){const url = new URL(location.href);if(url.searchParams.get('tag') !== null) return;/* do not overwrite */console.log(SCRIPTID, 'associate tag:', tag);document.documentElement.addEventListener('mousedown', function(e){for(let target = e.target; target; target = target.parentNode){if(target.href && target.href.startsWith(location.origin) && !target.getAttribute('href').startsWith('#')){const separator = (target.href.includes('?')) ? '&' : '?';target.href = target.href.replace(/(?=#)|$/, separator + 'tag=' + tag);}}});const separator = (url.search === '') ? '?' : '&';history.replaceState(null, document.title, location.href.replace(/(?=#)|$/, separator + 'tag=' + tag));}}})();