[Bug middle-end/51017] GCC 4.6 performance regression (vs. 4.4/4.5)

[solar-gcc at openwall dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=51017

--- Comment #9 from Alexander Peslyak <solar-gcc at openwall dot com> ---
(In reply to Andrew Pinski from comment #8)
> Can you try GCC 4.9?

Yes.  Bad news: things mostly became even worse.  Same machine, same JtR
version, same test script as in my previous comment:

4.9.2 - 1849K c/s, 28256 bytes

The code size is back to 4.1.0 to 4.3.6 levels (good), but the performance
decreased by another 13% since 4.6.2 (and by 38% since it peaked with 4.3.0). 
I ran this benchmark multiple times, and I also re-ran benchmarks with some
previous gcc versions to make sure this isn't caused by some change in my
environment - no, I am getting consistently poor results for 4.9.2, and the
same results as before for other gcc versions.  I'll plan to test with some
versions in the range 4.7.0 to 4.9.0 next.

(I also see some much smaller regressions with 4.9.2 for other hash types.)