Optimizing page load speed on front end side
summary
A pragmatic checklist of concrete wins: aim for ~1s perceived load and measure time to first meaningful paint and time to interactive with Navigation Timing, Performance Observer and User Timing APIs and send results via Beacon. Shrink assets with minification (up to 50%) and compression (gzip/brotli up to ~60%), optimize images (they are ~60% of page weight), use responsive images/WebP fallbacks, code-split and Tree shaking, inline critical CSS, preload or HTTP/2 server push, lazy-load with Intersection Observer — real example: 5.2 MB to 500 KB.
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chapters (8)
- 0:00Introduction to page load optimization
- 3:07User perceived page load speed
- 5:58Focus on static asset delivery
- 7:01Reduce static asset size
- 11:34Shorten asset delivery distance
- 13:23Smart loading strategies
- 18:03Continuous performance process
- 19:30Q&A session
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