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benchmarks.md

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Benchmarks

This folder contains small, reproducible benchmarks for ItemsJS. They are optional and not part of the published package.

Snapshot benchmark

Script: npm run benchmark:snapshot

  • Compares fresh index build vs loading from snapshot.
  • Defaults: sizes 1000,10000,30000. Override with SIZES=5000,20000 npm run benchmark:snapshot.
  • Output includes cold-start speedup (build/load) and snapshot size.
  • Note: In the browser, total cost also includes fetch + JSON.parse if you download the snapshot.

Search benchmark

Script: npm run benchmark:search

  • Measures build/search/facets timings across scenarios: empty, query-only, filters-only, query+filters, boolean filter.
  • Defaults: sizes 1000,10000,30000, repeats per scenario 5.
  • Override: SIZES=5000,20000, REPEAT=10.
  • Dataset per size: 40 tags, 30 actors, 4 categories, boolean popular; each item has 3 tags, 1 actor, 1 category. Facets: tags, actors, category, popular. Searchable fields: name (boosted), tags, actors.
  • Stress facet-heavy setups with EXTRA_FACETS=1000 (each with 3 values) to see scaling for many facets.

Browser smoke test

  • Build: npm run build.
  • Run: npm run serve:benchmark and open http://localhost:4173/ (serves benchmarks/browser-snapshot.html), or open the HTML directly.
  • First load builds and stores a snapshot in localStorage; subsequent loads use the snapshot and log a sample search. Green message = OK; red/error or stuck on “Loading…” → check console.