[Tilesathome] Striped rendering is back

[Matthias Julius]

Patrick Kilian <osm at petschge.de> writes:

> stable:
> real    0m23.929s
> user    0m15.533s
> sys     0m0.688s
>
> unstable: (RenderStripes = 0)
> breaks after 1m50s
>
> unstable: (RenderStripes = 1)
> real    1m58.567s
> user    1m37.322s
> sys     0m12.201s
>
> unstable: (RenderStripes = 4)
> real    2m37.587s
> user    2m2.480s
> sys     0m23.581s
>
> unstable: (RenderStripes = 5)
> real    6m13.988s
> user    4m32.269s
> sys     1m20.893s

Are you using Inkscape or Batik?

Although I said that RenderStripes = 1 does the same as the client has
done before the difference with current _unstable is that it always
renders the whole tileset.  Previously the client was assuming all
zoom levels are empty if the top level (z12) is empty and it skipped
rendering of the other zoom levels.  This explains the difference in
user time above.

The other numbers are inverse on my machine.  That is RenderStripes =
5 is much faster that RenderStripes = 1.  But this is on a system with
8 GB of memory.

Did you actually try the numbers in between?  I could imagine the
optimum is somewhere there.

Matthias