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> can compile the Linux kernel from scratch in 20 minutes

so large projects compile time is very big, that's actually kinda bad for software developers.

> it can play 1080p video in real-time

yep until he tries to watch 1080p60fps on youtube, or gets videofiles encoded with 10bit x264 with large amount of reframes (that happens more often than you think btw)

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Well, how often do you recompile the whole project from scratch? Incremental builds are a thing.

And ccache!

It is too buggy and has too many false hits to be used in large projects.

Happens quite often with large c++ projects and some quirky includes. Change 1 header, recompile whole thing.

For comparison, rebuilding linux kernel with make defconfig takes about 3-4 minutes tops on my laptop, rebuilding one of the work projects - at least 15.

I don't think this points to a problem with the workflow, but rather to a problem with the codebase. If your codebase is so big and complicated and interlinked that it requires frequently recompiling large swaths of it - it may be poorly designed.

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