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Amazon CPU Tamer

减少Amazon购物页面上的CPU利用率。顺利地享受买东西吧。

当前为 2020-12-07 提交的版本，查看 最新版本。

  1. // ==UserScript==
  2. // @name        Amazon CPU Tamer
  3. // @name:ja     Amazon CPU Tamer
  4. // @name:zh-CN  Amazon CPU Tamer
  5. // @namespace   knoa.jp
  6. // @contributionURL https://paypal.me/kantankikaku
  7. // @description It reduces CPU usage on Amazon shopping pages. Enjoy your snappy shopping.
  8. // @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。
  9. // @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。
  10. // @include     https://www.amazon.com/*
  11. // @include     https://www.amazon.co.jp/*
  12. // @include     https://www.amazon.co.uk/*
  13. // @include     https://www.amazon.*
  14. // @include     https://*.amazon-*.com/*
  15. // @include     https://*.*-amazon.com/*
  16. // @exclude     */cart/*
  17. // @exclude     */buy/*
  18. // @version     1.3.1
  19. // @grant       none
  20. // @run-at      document-start
  21. // ==/UserScript==
  22.  
  23. /*
  24. [update]
  25. Minor fix.
  26.  
  27. [memo]
  28. top:    interval さまざま多数, timeout インタラクションのみで定常なし
  29. iframe: interval なし,         timeout 定常 100ms が iframe ごとに1つずつ
  30. */
  31. (function(){
  32.   const SCRIPTID = 'AmazonCpuTamer';
  33.   console.log(SCRIPTID, location.href);
  34.   const TAMEDINTERVAL = 60*1000;/* a bunch of intervals does cost so much even if the processes do nothing */
  35.   const QUICKRESPONSE =  1*1000;/* some of the interactions need rather quick response such as video guides */
  36.   const IFRAMETIMEOUT =  1*1000;/* amazon uses timeouts instead of intervals on iframes */
  37.   /* tame quick intervals */
  38.   const originalSetInterval = window.setInterval.bind(window);
  39.   window.setInterval = function(f, interval, ...args){
  40.     if(interval < TAMEDINTERVAL){
  41.       console.log(SCRIPTID, 'interval:', interval, 'to', TAMEDINTERVAL, location.href);
  42.       interval = TAMEDINTERVAL;
  43.       window.setTimeout(f, QUICKRESPONSE, ...args);
  44.     }
  45.     return originalSetInterval(f, interval, ...args);
  46.   };
  47.   /* tame quick timeouts on iframe ads */
  48.   if(window !== top){
  49.     const originalSetTimeout = window.setTimeout.bind(window);
  50.     window.setTimeout = function(f, timeout, ...args){
  51.       if(document.hidden) return;
  52.       if(timeout < IFRAMETIMEOUT){
  53.         //console.log(SCRIPTID, 'timeout:', timeout, 'to', IFRAMETIMEOUT, location.href);
  54.         timeout = IFRAMETIMEOUT;
  55.       }
  56.       return originalSetTimeout(f, timeout, ...args);
  57.     };
  58.   }
  59.   /* add an associate tag */
  60.   switch(location.host){
  61.     case('www.amazon.com'):
  62.       addTag('knoa-20');
  63.       break;
  64.     case('www.amazon.co.uk'):
  65.       addTag('knoa-21');
  66.       break;
  67.     case('www.amazon.co.jp'):
  68.       addTag('knoa-22');
  69.       break;
  70.   }
  71.   function addTag(tag){
  72.     const url = new URL(location.href);
  73.     if(url.searchParams.get('tag') !== null) return;/* do not overwrite */
  74.     console.log(SCRIPTID, 'associate tag:', tag);
  75.     document.documentElement.addEventListener('mousedown', function(e){
  76.       for(let target = e.target; target; target = target.parentNode){
  77.         if(target.href && target.href.startsWith(location.origin)){
  78.           const separator = (target.href.includes('?')) ? '&' : '?';
  79.           target.href = target.href + separator + 'tag=' + tag;
  80.         }
  81.       }
  82.     });
  83.     const separator = (url.search === '') ? '?' : '&';
  84.     history.replaceState(null, document.title, location.href + separator + 'tag=' + tag);
  85.   }
  86. })();