On Thu Sep 01 09:28:21 2016, c...@zoffix.com wrote:
> This program starts off at 140MB and rapidly grows to 1.7GB of used
> RAM by the 1000th iteration:
>
> perl6 -e 'for ^1000 { say "Iter $_"; "foo".subst: :g,
> /<{"abc".comb.join("\\s")}>/, "" }'
>
> If the interpolated string is changed to just "a\\sb\\sc", the issue
> goes away.
>
> And if we store the computation in a variable first and then use the
> variable in a regex, the leak seems to be much less severe (but still
> present; leaks up to about 500MB by the 1000th iteration):
>
> perl6 -e 'for ^100000 { say "Iter $_"; my $x = "abc".comb.join("\\s");
> "foo".subst: :g, /<$x>/, "" }'
Boiled down to an EVAL-related leak, which was in turn due to a serialization
context management bug in MoarVM. Fixed now; it grows to a point then settles.
/jnthn
