Sean Reece

Software Engineer @ Qlik

@SeanReece

Benchmarking JS

with React

We should forget about small efficiencies, say about 97% of the time: premature optimization is the root of all evil. Yet we should not pass up our opportunities in that critical 3%.

premature optimization is the root of all evil.

When do I optimize?

Optimize only when it makes sense
Don't sacrifice simplicity/readability
Measurable

JSprf.com

JavaScript Performance

Why

JSperf.com offline

Writing benchmarks in NodeJS REPL

How

Monaco Editor

Used by VS Code

IntelliSense

Dynamic import() 🔥

Stage 3 proposal

import modules at runtime

Chrome / Safari 👍

Firefox 👎

Benchmark.js

A benchmarking library that supports high-resolution timers & returns statistically significant results.

Thanks! 👋

github.com/SeanReece/jsprf.com