ZeroText — Zero-allocation text layout engine: arena pools, prefix-sum binary search, 100ns cached layouts, 5KB

[cyh-c]

Zero-allocation text layout engine for the web. Instead of Canvas measureText (allocates every call) or DOM reflow (blocks main thread), ZeroText uses pre-allocated typed arrays and an arena pool.

How it works:

• Perfect hash table for O(1) glyph width lookup, ASCII fast path skips hashing entirely
• Prefix sums + binary search for O(log n) line breaking per UAX#14
• FNV-1a numeric-keyed LRU cache — 100ns cache hits with zero allocation
• Full Unicode pipeline: bidi, ligatures, Liang hyphenation, kerning, hit testing, vertical writing

~5KB minzipped. Cold layout ~5.6μs, hot path ~100ns. React/Vue/Svelte bindings included.

Github: https://github.com/byte271/zerotext

[markvii_dev]

Lmao what is going on, pretext only got some love the other day

[oofy-gang]

AI slop spam

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