Invisible performance. How fast is your JavaScript code?
summary
Covers practical JavaScript performance tips: use 'use strict' and a linter (Standard) to catch bad patterns, prefer high-level constructs like Object maps and Object.assign instead of long if/else chains, and use LRU caches to avoid repeated expensive work (e.g., regex or distance calculations). Recommends factory/composition instead of new/constructors to reduce prototype/memory issues, avoid heavy regexes when simple string checks suffice, and prefer native methods and block-scoped let/const over var for more predictable performance.
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chapters (11)
- 0:00Introduction
- 7:19Use 'use strict'
- 15:25Avoid 'else' and 'switch' with objects
- 18:12Cache frequent results
- 21:25Use native JS methods
- 24:54Declare with 'let' and 'const'
- 26:42RegEx: when and how
- 31:11Avoid unnecessary 'bind'
- 33:41Constructor alternatives
- 43:17Simplicity for performance
- 44:21Q&A
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