Serious question: how can a build tool be fast or slow? From my understanding all it does is delegate the build steps to other tools, so wouldn't those be the bottleneck? Is it the resolution of order of build steps that takes so much time that a different build system can make a difference?

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evmar 5 hours ago | parent [-]

[ninja author] My first post about Ninja goes into this: https://neugierig.org/software/chromium/notes/2011/02/ninja....

	▲	HiPhish 5 hours ago \| parent [-]
		I'm afraid I still don't understand. One factor is having fewer features and not looking for obsolete files, that I can understand. I guess the other thing is using better rules to figure out when a file truly need to be rebuilt?