privat/nit — pull request #50 by Morriar (2013-08-02 18:07:57+00:00)
Title: Layout_builders: introduce posets for better performances

Stats for nitg --separate ./nitg.nit
before:
0:40.04 elapsed,
39.33 user,
0.90 system

after:
0:27.58 elapsed,
26.87 user,
0.90 system

Average on three samples collected with GNU time. .nit_compile cache is cleaned between each run.

Signed-off-by: Alexandre Terrasa