Changelog

Windmill now pre-bundles TypeScript (Bun) scripts using Bun bundler and caches them on S3 and locally at deployment time. Furthermore, if a Bun script is run while not being pre-bundled, it will be re-bundled. This will increase stability and optimize (in some cases with 60% improvement) the execution time and the memory consumption, in particular for scripts with many/heavy imports and relative imports.

We also did improvements for non-deployed scripts using better caching strategies for the dependency cache. You cannot do any faster than running a pre-bundled script aside from having the script being already running which is what dedicated workers are made for. This makes Windmill the fastest platform to run TypeScript.

However, in very rare cases (< 1%), this might break existing bun scripts that are incompatible with being bundled. If you notice such issue for a particular script after the upgrade, add //nobundling to the top of the script.