CRC32c:
http://mails.dpdk.org/archives/dev/2016-February/033550.html
Do I miss something ?
Best regards,
Le 10 mars 2019 16:32:07 Andrew Brampton <bramp...@gmail.com> a écrit :
Awesome, thanks for sharing.
Their documentation does not specify which kind/polynomial their crc32 is.
However looking at its usage, it seems to be crc32b (used in networking).
I'm looking to add crc32c, which is used mainly in storage systems.
Thanks
Andrew
On Sun, 10 Mar 2019, 3:52 am Vincent Jardin, <vjar...@free.fr> wrote:
Hi Andrew,
Fyi, the fastest CRC32 and other hash are available with the DPDK librairies :
https://git.dpdk.org/dpdk/tree/lib/librte_hash
Both, ARM core engineers and Intel have been working with some other
networking companies to have it very efficient.
I hope it can help,
Vincent
Le 10 mars 2019 07:36:46 Andrew Brampton <bramp...@gmail.com> a écrit :
Hi,
I recently contributed a crc32c implementation to PHP's hash function
<https://github.com/php/php-src/pull/3913>. However, I wanted to get
hardware acceleration, and support older versions of PHP. So I wrote a new
extension that uses github.com/google/crc32c, which utilised hardware
acceleration on modern intel CPUs.
My quick benchmark shows:
CRC32_PHP 12.27 MB/s (pure php solution)
CRC32_Builtin 468.74 MB/s (my pull request above)
CRC32C_Google 24,684.46 MB/s (using new extension)
I'm in the process of open sourcing my code (I have to jump though some
hopes at my day job), but soon after I would like to publish the pure PHP
implementation to packagist, and the compilable extension to pecl.
Per the account request guidelines
<https://pecl.php.net/account-request.php>, I'm reaching out to say hello.
A quick note about myself, I've been a avid contributor to open source for
a decade, but I haven't touched PHP recently. I have far too many project
on my github <https://github.com/bramp>. I also work at Google as a Cloud
Storage (GCS) SRE, and while my interest in crc32c was to improve the GCS
API support, I'm doing this as 20% instead of my main duties.
thanks
Andrew
