21 Aug
2014
21 Aug
'14
7:18 p.m.
On Thu, Aug 21, 2014 at 3:51 PM, Alexander Pakhomov
Which GHC version do you use? With 7.6.3 I have all the same BUT Optimal'/10 260 ns. It's better than 1200 ns but still bad. Also there are INLINEs everywhere at vector-algorithms. Seems to be compiler problem.
There's a lot of sensitivity in the compiler to exactly how and which rules are specified. I already brought up this regression with Dan a few weeks ago, and we didn't come up with a good way to deal with it. I don't think it's quite fair to call it a compiler problem, so much as just a change that caused a previously-good-but-fragile behaviour to now not be so good.