speeding up javascript one library at a time

https://marvinh.dev/blog/speeding-up-javascript-ecosystem/

Nice post showing how the author used flame graphs to find performance problems in some common JS libraries, and removed them (mainly by preventing unnecessary type conversions (which cause allocations))

mentioned speedscope, which is a really handy tool

https://marvinh.dev/blog/speeding-up-javascript-ecosystem-part-12/

Part 12 is fun, showing how a very simple parser can speed up the semver package by an order of magnitude.