Why build another JavaScript build tool? The current build tools for the web are at least an order of magnitude slower than they should be. I’m hoping that this project serves as an “existence proof” that our JavaScript tooling can be much, much faster.

According to the author, esbuild is fast because..

1. it’s written in Go
2. much of the work is done in parallel
3. it takes very few passes and avoids data transformations
4. it was coded with performance in mind