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Comment by jcelerier | Hacker News Reader

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jcelerier·

> Spectre probably knocked of Intels performance advantage, but is CPU performance really our current bottleneck?

this is what my computers have to say about that :

https://i.imgur.com/2MGzz58.png

https://i.imgur.com/h2d8FO8.png

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No, they aren't. (That said, they're completely uninformative and I have no idea what the heck these tiny unlabeled ASCII graphs are trying to convey. The ability to draw a lot of | characters quickly, perhaps?)

Look up "htop output" on Google image search.

I was expecting a before & after set of graphs.

it's my cpu usage when building stuff - 100% on all of my cores

Quite a sight to see. I'm surprised that the build process is able to efficiently use up all of those cores. Plus I see you've got 64 GB memory, quite a beast of a machine. Care to share some more hardware specs and some details about the build process? (Compiler, language, purpose?)

sure - cpu is an i7 6900k so 8 core / 16 threads, overclocked at 4ghz. The software (https://ossia.io) is in C++17 built with cmake / ninja / clang / lld so an incremental rebuild is between 1 and 5 seconds for most files (which is still waaay too slow for quick edits), but a full build is 5-7 minutes depending on the optimization options, debug mode, LTO, etc.

Also, most ram here is not taken by the build process but by firefox tabs & a windows VM.

Hugely interesting bit of nerd porn, thanks for the reply.

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