[jblack: Re: [tools-discuss] Evaluation notes on bzr-0.7]

[Aaron Bentley]

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Michael Ellerman wrote:
> On 3/6/06, Robey Pointer <robey at lag.net> wrote:
>>I think if I could start up a little daemon at login that would
>>automatically track 'bzr edit's for me, I'd probably do it.
> 
> 
> I think that sounds reasonable, but I think we want to make sure it's
> a useful optimisation first.
> 
> I did a quick test the other week and given a hot cache I can stat my
> entire kernel tree (18,976 files) in somewhere around 0.65 seconds
> (including python startup). A 'bzr st' takes 11 seconds, so I think
> there's some fat we can work on before we worry too much about the
> cost of stat'ing the whole tree.

I agree that we should do our best to trim this fat, but the OpenSolaris
data showed it was spending 5 seconds in lstat64.  So for their case, I
think trimming the fat won't be sufficient.

Aaron
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