Re: Erlang 18.0-rc1 is behaving slower than 17.4 (and 17.5)

Björn-Egil Dahlberg <[email protected]> Mon, 13 Apr 2015 23:12:23 +0200
Newsgroups gmane.comp.lang.erlang.bugs
Message-ID <CAMjYFoOQopLLCf5dEWod30Hs3jsPVQz6vMT_Kk-TcQqjHMfWoA@mail.gmail.com>
2015-04-13 18:44 GMT+02:00 José Valim <[email protected]>:

> *3. The emulator in 18.0 takes considerably more memory than 17.3*
>
> After running observer:start() on both, 18.0 takes 55MB while 17.3 takes
> only 18MB.
>

This is most likely due to multiple timer wheels in 18. We now have one
wheel per scheduler and a larger wheel to boot. I'm unsure to why it is so
large though. Rickard? TIW 16x larger?

You can see the size vary with +S <n> switch.

// Björn-Egil

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