Ph. Marek wrote:
> On Thursday 16 February 2006 23:03, Julian Foad wrote:
>
>> For a locally-modified file with keyword translation enabled, I noticed
>> that "svn status" processes the locally-modified file every time I run "svn
>> status".
>>
> ...
>
>> Here's a practical example. In my Subversion trunk tree, with 11 files
>> locally modified:
>>
>> $ svn st -q > /dev/null
>> $ time svn st -q > /dev/null
>> real 0m0.702s
>> user 0m0.464s
>> sys 0m0.228s
>>
>> $ touch subversion/libsvn_*/*.[ch]
>>
>> $ svn st -q > /dev/null
>> $ time svn st -q > /dev/null
>> real 0m1.764s
>> user 0m1.204s
>> sys 0m0.536s
>>
>> These are in both cases repeatable times, when all the files are in the
>> OS's disk cache so the disk activity light doesn't even flicker.
>>
> How about storing an MD5 of, say, every 64kB of the translated file?
> Then a comparision wouldn't need to compare N bytes to N bytes (with approx.
> 2*N/2 read on average),
Did you count the cost of computing the MD5?
-- Brane
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Received on Tue Feb 21 10:48:27 2006