jit.gl.sketch Max6 to slow compare to Max5

hi,
i did a patch to draw a lot of line in a space (tableau2). The coordinates of the line, the angle, the diameter and the time are get in a jit.cellblock.
i use the poly~ object with subpatch (map1b) who contain a jit.gl.sketch to draw a lot of line in a same time or different time.
In max 5 the Fps is good for my use.
But now i work with Max6, and the Fps is slower. why?
would you know an issue to solve this problem?
(i'm sorry, i know my patch is very tortuous ... )
Cordialy, thank's for your help