[glob2-devel] I will make gradients up to 270% slower

[Nuage]

No no, I am joking, I hope you where affraid... he he he he

I did try another optimisation and here are the results: (All this has been
compiled with "-march=pentium3 -O3")
-On a 128x128 active map, runing for 60s, I got a cpu median use going down from
30% to 23%, that is a +30% relative speed improvement. (see the plot at the end
of the e-mail)
-On a 256x256 not really active map, runing for 185s, I got a cpu median use
staying at 30%. The average time is about 2% faster anyway, that is a +6%
relative speed improvement.

Can you notice any change ?

Nuage


before
cpu usage graph:
100.0 % | *
 98.5 % |
 95.0 % |
 93.5 % |
 90.0 % |
 88.5 % |
 85.0 % |
 83.5 % |
 80.0 % |
 78.5 % |
 75.0 % |
 73.5 % |
 70.0 % |
 68.5 % |
 65.0 % |
 63.5 % |
 60.0 % |
 58.5 % |
 55.0 % |
 53.5 % |
 50.0 % |
 48.5 % |
 45.0 % |
 43.5 % | *
 40.0 % | *
 38.5 % | **
 35.0 % | *****
 33.5 % | **************
 30.0 % | ***************************
 28.5 % | ****************
 25.0 % | **************
 23.5 % | ****************
 20.0 % | ***
 18.5 % |
 15.0 % |
 13.5 % |
 10.0 % |
  8.5 % |
  5.0 % |
  3.5 % |
  0.0 % |

after
cpu usage graph:
100.0 % | *
 98.5 % |
 95.0 % |
 93.5 % |
 90.0 % |
 88.5 % |
 85.0 % |
 83.5 % |
 80.0 % |
 78.5 % |
 75.0 % |
 73.5 % |
 70.0 % |
 68.5 % |
 65.0 % |
 63.5 % |
 60.0 % |
 58.5 % |
 55.0 % |
 53.5 % |
 50.0 % |
 48.5 % |
 45.0 % |
 43.5 % |
 40.0 % |
 38.5 % |
 35.0 % | *
 33.5 % | **
 30.0 % | *
 28.5 % | *********
 25.0 % | ***********************************
 23.5 % | *******************************************
 20.0 % | ********
 18.5 % |
 15.0 % |
 13.5 % |
 10.0 % |
  8.5 % |
  5.0 % |
  3.5 % |
  0.0 % |