cargo install pax px --watch index.js bundle.js Why? time px index.js bundle.js real 0m0.015s user 0m0.006s sys 0m0.006s Your bundler is a tool. It’s supposed to help you, not slow you down. You know the feeling. You make that tweak, hit ⌘S ⌘Tab ⌘R, and… nothing changes. You get the old version. You beat the bundler. You wait a few seconds, hit ⌘R again, and your changes finally show up. But it’s