Andrei Alexandrescu needs to read this
Andrei Alexandrescu
SeeWebsiteForEmail at erdani.org
Sun Oct 27 21:45:38 UTC 2019
On 10/23/19 5:37 PM, welkam wrote:
> I watched many of his talks and he frequently talks about optimization
> that produce single digits % of speed up in frequently used algorithms
> but doesnt provide adequate prove that his change in algorithm was the
> reason why we see performance differences. Modern CPUs are sensitive to
> many things and one of them is code layout in memory. Hot loops are the
> most susceptible to this to the point where changing user name under
> which executable is run changes performance. A paper below goes deeper
> into this.
>
> Producing Wrong Data Without Doing Anything Obviously Wrong!
> https://users.cs.northwestern.edu/~robby/courses/322-2013-spring/mytkowicz-wrong-data.pdf
I know of the paper and its follow-up by Berger et al. Thanks.
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