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And so my attempt to have a performance test draws the final curtain, no
review.
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I guess windows can show a < 500x difference and still give us
confidence there isn't a 100,000x difference. Testing situation
continues to confound and amaze. Trying to make 4279 not fail on
windows, one more time and I will delete it and burn the bodies. No
review.
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One hundred! One hundred times slower on windows! Ah, ha, ha! Adjusted
test case, no review.
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Raised the threshold for the test looking at view performance. I guess
if views are only 50x as slow on windows that's still a lot better than
100,000. (The real issue is more like "it's windows" plus "it's windows
running on virtualbox".) No review.
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Almost all view classes now list parents like
trait Appended[B >: A] extends super.Appended[B] with Transformed[B]
instead of the former
trait Appended[B >: A] extends Transformed[B] with super.Appended[B]
because as it was, the implementation of foreach in
TraversableViewLike#Transformed was repeatedly trumping overrides found
in e.g. IterableLike. This change was not without its own consequences,
and much of the rest of the patch is dealing with that. A more general
issue is clearly revealed here: there is no straightforward way to deal
with trait composition and overrides when some methods should prefer B
over A and some the reverse. (It's more like A through Z in this case.)
That closes #4279, with some views being five orders of magnitude slower
than necessary. There is a test that confirms they'll stay performance
neighbors.
In the view classes (Zipped, Mapped, etc.) I attended to them with
comb and brush until they were reasonably consistent. I only use
"override" where necessary and throw in some "final" in the interests
of trying to anchor the composition outcome. I also switched the
newSliced, newZipped, etc. methods to use early init syntax since a
number have abstract vals and I found at least one bug originating with
uninitialized access.
There was a piece of a parallel collections scalacheck test failing,
which
I disabled out of expedience - am emailing prokopec.
There is plenty of work left to do but paulp must get back to other 2.9
issues. This is the Zurich->SF airplane patch. No review.
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