[PATCH 1/4] libstdc++: Further simplify _Hashtable inheritance hierarchy

[François Dumont]

Great results, I'll have a look to the few performance tests.

And I should be able to make progress on fancy pointer support.

On 16/12/2024 15:41, Jonathan Wakely wrote:
> On Mon, 16 Dec 2024 at 14:26, Jonathan Wakely <jwakely@redhat.com> wrote:
>> I've pushed this patch series now, and I hope I'm done with
>> refactoring _Hashtable.
>>
>> I see about a 2% reduction in memory and in compilation time for an
>> explicit instantiation of std::unordered_list<std::string> when
> For a translation unit that does:
>
> template class std::unordered_set<int>;
> template class std::unordered_set<std::string>;
> template class std::unordered_map<int, int>;
> template class std::unordered_map<std::string, int>;
>
> I see a bigger improvement for -O2, between 5% and 10%, with fewer
> entries (and shorter entries) in the compiler's string pool.
>
>> comparing r15-5031-gdd08cdccc36d08 to current trunk. It's not huge,
>> but it's something, and I find the code easier to understand now.