Okay. The gimp version that comes installed is 2.2.15. So I went to our vl5.9 sources and downloaded the source and original (I'm assuming) slackbuild script. To keep the test fair I didn't change anything other than add:
export LDFLAGS="-Wl,--hash-style=gnu"
to the top line and edit the output name of the package so I could tell the packages apart.
To be honest I couldn't really see much difference in load times of the two packages. The one I made with --hash-style=gnu
MIGHT load a half of a second faster.
I did initial startup so gimp could setup the prefs. Reboot. Cold start. Close. Warm start. I started my times from execution until the 3 windows were loaded. So there should be some human error.
Gimp installed= 6 seconds cold, 5 seconds warm
Gimp rebuilt = About the same numbers, maybe a half second faster on both tries.
1 ghz Athlon Thunderbird, 512 MB ram, VL5.9x XFCE
It would seem that this confirms
rbistolfi's thoughts about the plugins.
But... I did test something else. The gimp installed was a .tlz package. I'm assuming there was a repack of the original .tgz to save disk space. So I repacked the gimp .tgz that I had built. There is a slight difference in size. Perhaps another way to squeeze more onto our ISO's?
leeh:$ ls -s
total 13000
6514 gimp-2.2.15-i486-1.tlz
6486 gimp-GNU-HASH-2.2.15-i486-1.tlz