// free download
Free Big O
Cheat Sheet
A one-page map of Big O speeds, JavaScript method costs, and the five fixes that solve most slow code.
- Big O speed ladder
- JavaScript built-in costs
- Container picker: Array, Map, Set, Stack, Queue
- Slow app checklist
- Five practical fixes
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Download the cheat sheet here.
Open cheat sheet →Opens a print-ready page — Cmd+P (Mac) or Ctrl+P (Windows) to save as PDF.