13 Nov
2007
13 Nov
'07
4:02 a.m.
"Neil Mitchell"
I just removed GHC 6.6.1 and installed 6.8.1, and I noticed something rather unexpected. I recompiled an existing program (with -O2), and instead of taking 30 seconds to compile, it took roughly 2 seconds.
In previous releases, certain constructs took O(n^2) time to compile. One that was a particular issue for me was:
I've noticed that largish data structures - in my case, ~20x20 matrices - embedded in code seems to take a surprisingly long time to compile. (I haven't noticed (nor looked for) any speedup with new releases, though.) -k -- If I haven't seen further, it is by standing in the footprints of giants