FYI: Grisu2 and Ryu should produce bit-identical outputs in all cases.

As far as I could tell, there wasn't any deep connection between the talks.

You're welcome.

It doesn't optimize for ints right now. I thought about that, but haven't tried it yet.

We realize that not everyone wants to check in all of their dependencies, and that's cool too. Check out the build encyclopedia for rules to talk to 'plain http' and maven repositories.

I work on Bazel.

We've put a bunch of work into making sure that we know about every file that goes into the Java compilation, and if any of them changes (and only then) do we recompile. Within Google, we use a form of sandboxing to enforce that.

You're also right that it isn't free - we have reason to believe that larger projects and larger teams will see benefits from using Bazel. Use your best judgement.