Andreas Rossberg wrote:
On 29 April 2015 at 02:21, John Lenz <[email protected]
<mailto:[email protected]>> wrote:
I missed it, thanks. I know things will improve in time but I'm
just coming from a discussion with folks complaining about the
performance of generators and GC overhead in real code with Chrome
and Firefox relative to simple hand written loops.
Note that there is a huge difference between optimising iterators (in
particular, for-of), and optimising generators. I expect that VMs will
start getting better on the former relatively soon, for iterators that
are not generators. Making generators fast is a much more complicated
problem.
But in either case, escape analysis and object allocation elimination
can avoid the flood of eden objects John cited, right?
I'm inferring your comment about generator optimization hardship has to
do with a function that yields -- whose CFG has multiple entry points
and whose activation record must live in the heap.
/be
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