GNU Binutils 2.41 release
Sam James
sam@gentoo.org
Sat Aug 5 00:38:06 GMT 2023
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.
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