[OSM-dev] OSM Date Formats

Jon Burgess jburgess777 at googlemail.com
Mon Oct 15 23:17:19 BST 2007

On Sun, 2007-09-30 at 15:01 +1000, Brett Henderson wrote:

> I'll fix osmosis to remove the millisecond information.  Are you willing 
> to update planet.c and planetdiff?  I can brush off my C skillz but it 
> will probably take me a while :-)

I've updated the planet.c code to generate dates in the format:


Loading a small planet dump in old vs new date format using Osmosis
produces the following timings:

  real    12m44.875s
  user    2m4.975s
  sys     0m23.508s

  real    10m47.347s 
  user    0m43.055s
  sys     0m2.443s

A >50% drop in CPU utilisation by Osmosis, even more if you include the
drop in system time as well. It is a shame that MySQL takes so long.


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