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lecture · 13:06 · 4 checkpoints · browser voiceIntermediate

Typeahead: ten suggestions before the next keystroke

One strong interview answer to "design typeahead search": two systems in one, an online path that does a single in-memory lookup from a replicated 10 GB snapshot, and an offline path that ranks queries by decayed popularity and hourly trends, filters them, and precomputes the top ten for every prefix; plus the client tricks, the CDN, and how to ship a snapshot safely.

Read the problem write-up: Design Typeahead Search (Autocomplete)→

01 · Two systems in one

IP-09 · Design Typeahead Search (Autocomplete)

Ten suggestions, before the next letter.

Ten suggestions, instantly

Type s y s into a search box, and ten suggestions appear before your finger reaches the next key.

~/systemdesignmastery.dev

0:00 / 13:06Two systems in one

chapters1/21

checkpoints 0/4 right · +10 XP each

space play · ←/→ step · J/L 10 s · C captions · M music · F full screen · < > speed · S snip

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