Re: [Fkt-devel] performance issues in fxt

[François Trahay]

On Thursday 25 August 2011 17:23:23 Samuel Thibault wrote:
> François Trahay, le Thu 25 Aug 2011 17:19:53 +0200, a écrit :
> > Actually fxt_next_ev calls 'read' several times, leading to a large
> > overhead. I managed to modify it so it reads 4KB blocks (reducing the
> > number of calls to read and thus the total overhead) and the performance
> > increases a lot: each call to fxt_next_ev now cost approx 200ns.
> 
> Mmm, shouldn't we be able to simply use fread & co instead of read & co?
> 
> Samuel

Well, we could reduce the number of calls to read to 2, but I think the impact 
on performance would be low (let's says that instead of 2µs per call to 
fxt_next_ev, we'd have 1.8µs).
I'll try and check the actual performance.

François