[mapserver-dev] mapserver 5.4 beta performance test

[Guillaume Sueur]

Hi,

I'd like to share some strange results I've got back when testing
mapserver 5.4 beta on a huge streets postgis layer.

here are the tests :
5.4 beta DEBUG ON -----------------------------------------------
 time /usr/local/src/mapserver-5.4.0-beta3/shp2img -m test.map
-map_debug 5 -o test.png
[Tue Mar 31 15:49:15 2009].935351 msDrawMap(): Layer 0 (streets), 1.617s
[Tue Mar 31 15:49:15 2009].935551 msDrawMap(): Drawing Label Cache, 0.000s
[Tue Mar 31 15:49:15 2009].935603 msDrawMap() total time: 1.619s
[Tue Mar 31 15:49:16 2009].24176 msSaveImage() total time: 0.089s
[Tue Mar 31 15:49:16 2009].24347 msFreeMap(): freeing map at 0x818f8e0.

real	0m1.719s
user	0m0.284s
sys	0m0.028s

5.4 BETA DEBUG OFF ---------------------------------------------
 time /usr/local/src/mapserver-5.4.0-beta3/shp2img -m test.map -o test.png

real	0m1.994s
user	0m0.408s
sys	0m0.020s

as you can see it goes faster with debug ON (tested several times)

if I try it back with mapserver 5.2 I get :

5.2 DEBUG ON -----------------------------------------------
time /usr/local/src/mapserver-5.2.0/shp2img -m test.map -map_debug 5 -o
test.png
[Tue Mar 31 15:52:01 2009].891334 msDrawMap(): Layer 0 (streets), 1.434s
[Tue Mar 31 15:52:01 2009].891549 msDrawMap(): Drawing Label Cache, 0.000s
[Tue Mar 31 15:52:01 2009].891603 msDrawMap() total time: 1.437s
[Tue Mar 31 15:52:02 2009].43083 msSaveImage() total time: 0.151s
[Tue Mar 31 15:52:02 2009].43240 msFreeMap(): freeing map at 0x81878e0.

real	0m1.599s
user	0m0.268s
sys	0m0.016s

5.2 DEBUG OFF  -----------------------------------------------

 time /usr/local/src/mapserver-5.2.0/shp2img -m test.map -o test.png

real	0m1.481s
user	0m0.296s
sys	0m0.008s


So the 5.4beta seems definitely slower than 5.2, and goes even slower
when DEBUG is off.

Is there a special setting activated by default on beta releases which
could explain that ?

Best regards

Guillaume