Re: GNU Binutils 2.41 release

[Sam James <sam@gentoo.org>]

ASSI <Stromeko@nexgo.de> writes:

> Nick Clifton via Binutils writes:
>> We are pleased to announce that version 2.41 of the GNU Binutils project
>> sources have been released and are now available for download at:
> […]
>
> I see massive performance degradation in ld on Cygwin when linking
> libraries or executables with a large number of objects.
>
> For example compiling protobuf-21.12:
>
> binutils-2.39: 1420.820u 143.747s  3:20.37 780.8%      0+0k 0+0io 41531073pf+0w
> binutils-2.40: 1429.088u 140.548s  3:18.48 790.8%      0+0k 0+0io 41615637pf+0w
> binutils-2.41: 1496.555u 524.457s 10:07.31 332.7%      0+0k 0+0io 41570112pf+0w
>
> The linking step alone:
>
> binutils-2.39:   14.212u   2.614s  0:20.54 81.8%       0+0k 0+0io 1909884pf+0w
> binutils-2.40:   13.371u   0.839s  0:20.46 69.4%       0+0k 0+0io 1910885pf+0w
> binutils-2.41:   85.507u 373.960s  7:55.39 96.6%       0+0k 0+0io 1905021pf+0w
>
> I have another much larger application where the linking went from
> seconds to over an hour.
>
> The fact that a lot of that extra time is spent in system might provide
> a clue for finding the culprit.  BUt there's extra time in user as well
> and it seems to scale superlinearly with the number of objects.  It's
> possible that objdump performance has also suffered, I've not yet
> checked this in detail.
>

Please file a bug with the details so we can discuss it there and
collect some reproducers.

>
> Regards,
> Achim.