Jarred Sumner(@jarredsumner):Most JavaScript usage is just-in-time compiled. As code runs, types of values are watched and when a function runs frequently enough, a faster specialized version of that function is compiled on-demand. Ahead of time compilation bakes that work into the executable itself.

Jarred Sumner

@jarredsumner

building @bunjavascript at @anthropicai. formerly: @stripe (twice) @thielfellowship. high school dropout. npm i -g bun

Joined May 2014

647 Following 199.1K Followers

Jarred Sumner@jarredsumner

2026.09.29 01:06

Most JavaScript usage is just-in-time compiled. As code runs, types of values are watched and when a function runs frequently enough, a faster specialized version of that function is compiled on-demand. Ahead of time compilation bakes that work into the executable itself.