<link rel="preload" href="heavy-script.js" as="script" onload="this.onload=null; let s=document.createElement('script'); s.src=this.href; document.body.appendChild(s);"> Your page becomes interactive 2-3 seconds earlier, while heavy resources sneak in through the backdoor. Hack #5: The will-change GPU Trap will-change tells the browser to prepare for an animation. The hack is using it on every interactive element, forcing the browser to promote them to their own GPU layers.
So go ahead. Open DevTools. Profile your app. And start hacking. Your users will thank you with every millisecond saved. Have you tried any of these speed hacks? Share your performance war stories in the comments below. html5 speed hack
// Your heavy rendering here updateDOM(); requestAnimationFrame(speedHackAnimation); } <link rel="preload" href="heavy-script