We've upgraded from Chapel 1.11 to 1.13 recently, and we're seeing a
drop-off in performance (by about a factor of two) of our Chapel code
for Nussinov's Algorithm for RNA sequence alignment. Has anyone else
noticed a difference? Does anyone have easy access to both 1.11 and 1.13
and time to verify this result if I send the specific code? We could
perhaps try to install two versions at once, but if this is a known
problem, I don't want to bother, and if it is new, I thought this might
be easier for the developers to confirm, and interesting if it is indeed
a change.
Note that we also did a hardware upgrade recently, and it is possible
that the old numbers come from the old hardware, but I wouldn't expect
an hardware upgrade to make things /slower/ ... in case anyone cares, we
went from first-generation i7's (i7-860, I think?) to new i5-6500's, and
this is a single-threaded code.
Thanks for any insight anyone can provide,
Dave Wonnacott
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