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Chapter 1 · A client asks, a server answers
Chapters
Keyboard
- Space Play or pause
- ← → Back or ahead 5 seconds
- [ ] Previous or next chapter
- C Captions · M Mute · F Full screen
Transcript
Notes for class
- Watch after Who Fell Off the Ladder?; next is One URL, Seventy Requests, then the Availability lesson and its two films, Engineering for the Extreme? and A Budget for Patience.
- The Performance Law: send less data, less often, from nearby, and only when needed.
- Check the page-weight trend yourself in the HTTP Archive's page weight report.
- Try it yourself: in DevTools, throttle the network to Slow 4G and reload the last thing you built. That is the localhost effect, removed.
- The narration is a synthetic voice (ElevenLabs). Timing follows the narration track, so a recorded voice-over can replace it cue for cue using the transcript.
- With Reduce Motion turned on in the operating system, the film keeps its fades and drops the sliding motion.
- Set in Atkinson Hyperlegible Next and Mono, typefaces the Braille Institute designed for readers with low vision.
Take it with you
- Video (MP4, 1080p, 11:48, 18 MB), with English captions built in
- Captions: WebVTT or SRT, for Canvas or YouTube
- Narration script (plain text) with chapter timecodes, for recording your own voice-over