On Mon, Nov 13, 2017 at 11:50 PM, Julian Andres Klode wrote:
> (forwarding this to ubuntu-devel-discuss and Zygmunt)
>
> On Mon, Nov 13, 2017 at 10:33:39PM -0800, Shawn Landden wrote:
>> Package: command-not-found
>> Severity: wishlist
>>
>> I re-wrote command-not-found to get rid of the python dependancy, and
>> to reduce the database size, as to reduce memory usage.
>>
>> https://github.com/shawnl/command-not-found
>>
>> I was preparing to upload it to mentors as command-not-found-ng
>
> I also rewrote it years ago, but using the same database format,
> just in C. It was a lot faster. I don't understand the memory usage
> bit - it should not matter how large the database is, it's memory
> mapped, and not read into memory, as such memory usage should be
> roughly constant.
>
> Questions/Comments for your approach:
>
> * Did you test your format on a slow HDD with caches dropped? It
> must not be slower than the Python one (that one is way too slow
> already) - I did, it seems to be faster (0.4 vs 0.68 seconds)
> - I believe the database-based C rewrite was even much faster,
> though.
I switched it to mmap() and am now getting 0.27-0.45 with caches
dropped, even after adding translations. It is 100% C and sh. (same
postinst and postrm)
Ping.
--
Ubuntu-devel-discuss mailing list
Ubuntu-devel-discuss@lists.ubuntu.com
Modify settings or unsubscribe at:
https://lists.ubuntu.com/mailman/listinfo/ubuntu-devel-discuss
