[throwaway43234]

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.

[dirtnugget]

True, with the Angular CLI I believe this has even the default for a while locally but I have yet to encounter incremental compilation during CI e.g.

Also running tests is quite time consuming of you do not run them in parallel.

I guess bazel would be a good fit with Typescript.

As for deno, I did not follow the topic but I hope they at least annotated with JSDoc so developers can get some linting.