** Description changed:

  Binary package hint: gnome-terminal
  
  Transparent background heavily slows down gnome-terminal startup time.
  Graphic card: ATI RV730XT [Radeon HD 4670]
  evidence:
  time gnome-terminal -x true
  
  [Transparent background]
  real  0m2.884s
  user  0m0.010s
  sys   0m0.020s
  
  [Solid background]
  real  0m0.079s
  user  0m0.040s
  sys   0m0.000s
+ 
+ strace -r shows the following possible bottleneck, almost at the very end:
+ [Transparent background]
+ 0.000060 poll([{fd=7, events=POLLIN}], 1, 25000) = 1 ([{fd=7, 
revents=POLLIN}])
+ 2.846312 read(7, 
"l\2\1\1\0\0\0\0\21\0\0\0'\0\0\0\6\1s\0\6\0\0\0:1.121\0\0"..., 2048) = 56
+ 
+ [Solid background]
+ 0.000082 poll([{fd=7, events=POLLIN}], 1, 24995) = 1 ([{fd=7, 
revents=POLLIN}])
+ 0.038611 read(7, 
"l\2\1\1\0\0\0\0\20\0\0\0'\0\0\0\6\1s\0\6\0\0\0:1.120\0\0"..., 2048) = 56

-- 
transparent background heavily delays gnome-terminal start up
https://bugs.launchpad.net/bugs/530094
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