[bgirard]

That's really cool. Fascinating to think about all the problems that get missed due to poor or missing visualizations like this.

I did a lot of work to improve the Mozilla build system a decade ago where I would have loved this tool. Wish they would have said what problem they found.

[dhooper]

(OP here) Thanks!

My call with the Mozilla engineer was cut short, so we didn't have time to go into detail about what he found, I want to look into it myself.

[bvisness]

Hello, I am the engineer in question. I am not actually super familiar with the details of the build system, but from when I saw, the main issues were:

- Lots of constant-time slowness at the beginning and end of the build

- Dubious parallelism, especially with unified builds

- Cargo being Cargo

Overall it mostly looks like a soup of `make` calls with no particular rhyme or reason. It's a far cry from the ninja example the OP showed in his post.

[epage]

What `cargo being cargo` problems are you having?