[erlang-patches] Improving ETS performances

[Данила Федящин]

Hello,

Any news regarding this patch?

2014-06-27 11:42 GMT+03:00 Francesco Lattanzio <franz.lattanzio@REDACTED>:

> Removed dots from commit messages.
> A new pull request has been submitted. Here is the new patch:
>
>   git fetch https://github.com/fltt/otp.git ets_nested_lht_4
>
>   https://github.com/fltt/otp/compare/erlang:maint...ets_nested_lht_4
>
> https://github.com/fltt/otp/compare/erlang:maint...ets_nested_lht_4.patch
>
> --
> Francesco Lattanzio
>
> On Wed, Jun 25, 2014 at 09:38:06PM +0200, Francesco Lattanzio wrote:
> > Hello again Sverker,
> >     I've made some progress with this patch. Briefly:
> >
> > * set tables and bag/duplicate_bag tables are now managed by dedicated
> >   code -- erl_db_hash.[ch] and erl_db_nested_hash.[ch] respectively
> > * reduced memory overhead
> >
> > You can compute the difference (in words) between the new and the old
> > implementations' memory footprints (when nested LHT is not active) of a
> > collection of 'n' objects sharing the same key as:
> >
> >   MemDiff = 4 - n
> >
> > I used this formula to fix the ets suite's memory test case.
> >
> > With regard to the yielding problem, I deciced not to fix it now for the
> > following reasons:
> >
> > 1) it is unrelated to the nested LHT, as the problem manifests itself
> >    even in the current (non-nested LHT) implementation
> > 2) you offered to fix it yourself
> >
> > The patch is available at:
> >
> >   git fetch https://github.com/fltt/otp.git ets_nested_lht_3
> >
> >   https://github.com/fltt/otp/compare/erlang:maint...ets_nested_lht_3
> >
> https://github.com/fltt/otp/compare/erlang:maint...ets_nested_lht_3.patch
> >
> > It is based on the maint branch.
> >
> > I've tested it on Linux x86_64, latest kernel (all the test suites) and
> > FreeBSD/i386 9.2 (only the emulator, kernel and stdlib test suites).
> >
> > Have another nice day.
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>
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