Libcofi replaced by arm-mem (can boost your system speed)

[Huulivoide]

For those who don't know the libcofi was a small library that had hand optimized
assembly version of 2 libc functions that could speed applications using those
functions a lot, when set to be preloaded.

Libcofi has now been superseded by arm-mem, it provided more hand optimized
functions and is also faster. This is included in raspbian by default, so make sure
to install this, it would be shame to have slower performance on Arch compared to
Debian...

https://github.com/bavison/arm-mem

AUR: https://aur.archlinux.org/packages/arm-mem-git/

Install it and reboot. All applications using lots of memX functions should see a nice
increase in performance.

[crashmaster]

Thanks for the hint!

[pepedog]

Huulivoide,
Want to submit a pull
https://github.com/archlinuxarm/PKGBUILDs
Look at notes at bottom of that page
Is there any subjective comparisons about?
Thanks

[rubenvb]

Why are these not being merged into (e)glibc? It seems the proper place for these things.

[Huulivoide]

I have tried to come up with some realworld benchmarks, but I haven't been able to find any.
There is a test program included in the arm-mem library source. Basically it just calls memcpy()
over and over again, measuring the time it takes to complete each call. With it one can see
a real difference between having libarmmem.so preloaded and not.

[CrawX]

For me, using libcofi has made a noticeable and reproduceable difference in playing back h264 videos.
I haven't looked at the code itself (and in probably don't know asm well enough to judge) but im pretty sure that tne replacement does have at least the effect of libcofi.

Greets,
CruX

[moonman]

I can see the library gets preloaded only if a user logs in. What if a service is running under a user that doesn't have any shell? It's probably better if you setup ld.so.preoload ?

[Huulivoide]

$this->bbcode_second_pass_quote('moonman', 'I') can see the library gets preloaded only if a user logs in. What if a service is running under a user that doesn't have any shell? It's probably better if you setup ld.so.preoload ?