Before reading, listen to this: this library can load up to 10 JS libraries at once at about 40ms.
Embed this library from CDN:
<script src="//cdn.jsdelivr.net/gh/Parking-Master/No-Time@latest/no-time.js" async></script>
Try loading at least 10 JS libraries or 10 CSS libraries at once. Then, test the loading speed.
Basically, It takes the slow-loading speed of a page, then minifies it by half (or less).
There is no downloader. You can easily get it with CDN:
<script type="text/javascript" src="//cdn.jsdelivr.net/gh/Parking-Master/No-Time@latest/no-time.js" async defer></script>
And make sure to put it right before the closing body tag
It checks if the load speed (ms) is higher than the loading speed -1000 or if the document is ready but the window is still loading.
But, it can also redefine the window even when it is still loading. If there is an error loading the document, No-Time can reload the page and cache.