On Tuesday 26 April 2005 13:39, Chris Mason wrote:
> As an example, here's the time to apply 300 patches on ext3. This was with
> my packed patches applied, but vanilla git should show similar percentage
> differences.
>
> data=writeback 32s
> data=ordered 44s
>
> With a long enough test, data=ordered should fall into the noise, but 10-40
> second runs really show it.
I get much closer numbers if the patches directory is already in
cache...data=ordered means more contention for the disk when trying to read
the patches.
If the patches are hot in the cache data=writeback and data=ordered both take
about 30s. You still see some writes in data=writeback, but these are mostly
async log commits.
The same holds true for vanilla git as well, although it needs 1m7s to apply
from a hot cache (sorry, couldn't resist the plug ;)
-chris
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