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Why are ARM builds consistently much longer than those for other processors?

Asked by Luís Infante da Câmara

In my PPA (https://launchpad.net/~luis220413/+archive/ubuntu/security-updates), builds for arm64 and armhf consistently take much longer (2 to 10 times) than the builds of the same source packages for amd64, i386, ppc64el and s390x. Why does this happen?

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Colin Watson
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Best Colin Watson (cjwatson) said : 		#1

I'm not sure there's a sensible answer we can give here beyond "the hardware is slower". We do have some hardware upgrades in (slow) progress, though.

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Luís Infante da Câmara (luis220413) said (last edit ): 		#2

"The hardware is slower" answers my question. I would like to get notified when hardware upgrades are done to the production ARM builders.

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Luís Infante da Câmara (luis220413) said : 		#3

Thanks Colin Watson, that solved my question.

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Colin Watson (cjwatson) said : 		#4

We just added a significantly faster arm64 compute node today which is taking a fair amount of the load already, so that's likely to help.

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Luís Infante da Câmara (luis220413) said : 		#5

Thanks!