[packagekit] Ipkg backend performance

[Richard Hughes]

On Fri, 2008-01-11 at 15:49 +0000, Thomas Wood wrote:
> Just did some very rudimentary tests of the ipkg backend on my desktop
> and on an armv4 device. After I observed the init overlapping, I
> implemented a reference count system so that I only initialised and
> destroyed when necessary. This gave some interesting results.
> 
> 
> x86 System (2.00GHz)
> --------------------
> 
> Without single init:
> 
> get-description runtime was 0.5 seconds
> get-depends runtime was 0.8 seconds
> search-name runtime was 1.2 seconds

That's pretty quick I think.

> ARMv4 System (266MHz)
> --------------------
> 
> Without single init:
> 
> search-name runtime was 6.9 seconds
> search-name runtime was 8.8 seconds
> search-name runtime was 3.8 seconds
> search-name runtime was 4.1 seconds

I guess you mean the same columns as above, but that sure seems too
slow.

> By looking at the verbose output, it seems like the init routine on arm
> takes about 4 seconds. I still suspect this is mostly ipkg itself, but
> you can see why it would be important to avoid running this more than
> once per instance if we can.

Totally. Heard loud and clear. Thanks for the numbers.

Richard.