cloog-isl vs cloog-polylib speed (13x)

[Uday Kumar Reddy B]

I noticed this significant difference in speed between
cloog-polylib-0.16.1 and cloog-isl 0.16.3. On attached cloog file,
cloog-isl takes 1.03s while cloog-polylib takes 0.08s (cloog options
-f 6 -l 8). For these cases, Pluto itself (minus cloog) takes about
0.2s. There are two cloog calls, and the total time is around 1.5s
with cloog-isl (1.03s + 0.3s out of it is for cloog calls). With
cloog-polylib, it will all run in 0.3s (0.1s for all cloog calls).
I'm interested in knowing if this time can be reduced since this is
not an isolated case, but true for all codes obtained with some new
support in Pluto.

Thanks,
-- Uday

[basil...@gmail.com]

As Wikipedia stated, isl and PolyLib use different approaches. Isl tries to give you exact answers, while PolyLib approximates results. Obviously this leads to different in speed.