If you take to time to set up incremental compilation, it's really quite fast. For reference, updates to the vscode repo (~5k files) take generally <300ms to recompile, and even incrementally updating after pulling in a batch of hundreds of commits takes only ~10 seconds.
It's concerning to me that the deno folks chose giving up on type safety over figuring out how to set up their development environment to better meet their needs.
It's concerning to me that the deno folks chose giving up on type safety over figuring out how to set up their development environment to better meet their needs.