[Benchmarking] Minor questions about mapserver output

[Dane Springmeyer]

Comparing Mapnik png output to MapServer I noticed at Mapnik output is RGBA and Mapserver is RGB as reported by `file`:

$ file 1_mapnik.png 
1_mapnik.png: PNG image, 415 x 514, 8-bit/color RGBA, non-interlaced

$ file 1_mapserver.png 
1_mapserver.png: PNG image, 415 x 514, 8-bit/color RGB, non-interlaced

Should I try to output RGB png's from Mapnik? I figure I could likely find a way to strip the alpha channel, though I doubt this would make much difference in performance of encoding either way.

I also I noticed that mapserver does not set content-length headers. Curious, is there a reason for this?

Dane