On Thursday, 18 February 2016 at 13:00:12 UTC, Witek wrote:
Anyhow, everything was good on 1 or 2 threads, or maybe few
more, on my laptop with old Dual Core CPU. I was able to speed
it up exactly by a factor of 2x.
I wanted to try it out on bigger machine, so used Amazone AWS
EC2 c4.8xlarge instance with 18 cores, 36 hyperthreads/vCPUs,
and results were pretty terrible.
In my experience multicore on a VPS does not work the same way as
muticore on a local dedicated machine. But my experience is from
a Linode instance back in 2014 when Linode only offered XEN
virtualization. It will be interesting to see how a Linode pans
out now that they offer KVM. I would encourage you to try with a
2-core Amazon AWS and see if you get a 2X performance scaling as
you got with a dedicated machine.
- Puneet
