Maybe consider rpmalloc

[Teemu Nätkinniemi]

Hi Mark,

Thanks a lot for looking into this issue! I wonder if there are any
other applications affected by this?

Teemu

ti 13. huhtik. 2021 klo 12.36 Mark Geisert (mark@maxrnd.com) kirjoitti:
>
> Hi Teemu,
>
> Teemu Nätkinniemi wrote:
> > Hello,
> >
> > Thanks for testing! I found a better test case with smaller files
> > which should clearly show the issue.
> >
> > https://drive.google.com/drive/folders/1jOilHtKrr6CHn7zg__DE93RCDyseoTB1?usp=sharing
> >
> > Here's the results. Bwa_working is the one with rpmalloc and
> > bwa_original is unpatched. As you can see the unpatched version with
> > several threads takes a  whole lot more time to finish even when
> > compared with unpatched exe running with a single thread. I am not the
> > only one experiencing the issue so I doubt it is my system.
> [...]
>
> Well this certainly does show the issue(s) you're seeing.  Short runs but long
> enough for me to get decent profiling.  Yes, malloc code shows up a lot in the
> profiles.
>
> I'm going to research some stuff and ask some questions of the Cygwin gurus to see
> if we can do something about this.
> Thanks a bunch,