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whoa, kati (github.com/google/kati) is awesome. i'm using some makefiles with a large (>1s with no changes) hot rebuild latency that is intensely irritating. built kati, spent a few minutes figuring out the things it didn't quite like, now hot rebuilds are -instant-

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Doesn't it just convert makefiles to ninja?

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It uses lower time complexity algorithms, avoids lots of unnecessary work and has built-in implementations of commonly used shell commands. It has clever things like a built-in $(shell find) where it can track the timestamps of those directories and avoid running find again.

12:48 PM · Nov 29, 2020Twitter Web App

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It's not just that ninja is faster but that it's a much faster implementation of dealing with make. It's not an entirely complete GNU make implementation and they take the practical approach of requiring minor build system adjustments. It's also more reliable than GNU make.

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It's clever enough to realize that it needs to cope with environment variables changing, etc. compared to GNU make where if you change CFLAGS, it's not going to realize that it actually needs to rebuild everything. It was made as a stopgap while Android moves to Blueprint files.

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