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List:       kde-devel
Subject:    Re: low performance of kio
From:       Stephan Kulow <coolo () kde ! org>
Date:       2000-04-20 8:11:57
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Stefan Schimanski wrote:
> 
> Am Wed, 19 Apr 2000 schrieb Stephan Kulow:
> > Stefan Schimanski wrote:
> > >
> > > Hi,
> > > I did some performance test of the KIO library and was very disappointed. A
> > > SimpleJob reading a local file only transfered 180-200 KB/s. Reading with stdio
> > > functions (fopen, fread, etc.) transfer more than 3000 KB/s! Although KIO works
> > > in background with signals and slots it should be faster I think. Is there any
> > > chance to speed it up?
> > >
> > Why should it be faster? KIO isn't really made for reading local files,
> > but
> > for network transparency, where 200KB/s is most often good enough. if
> > you want
> > to read a local file, use fopen and fread. What you do when using kio is
> > doing
> > the same, but redirect the commands and the data to another process,
> > inheritly
> > making it slower as the IPC bandwidth is far lower than the usual file
> > reading.
> 
> I agree. But why are local jobs done in the process at all. Wouldn't it be much
> better to do them in a in process file? Only an idea...

Because that blocks the application. If you want speed, use fread - if
you want
nonblocking IO, use KIO

Greetings, Stephan

-- 
It said Windows 95 or better, so in theory Linux should run it
                                                GeorgeH on /.

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