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Given that all of the values are thrown away by grep, I expect the memory usage to be constant (even though the code will never finish). However, it seems that there's a leak somewhere.
There's a lot to this, so please see IRC log: https://irclog.perlgeek.de/perl6-dev/2017-08-02#i_14956475
For example, gather-take seems to be leaking as well, and in some cases it doesn't leak if you remove map, or if you use a range instead of a sequence�
On Wed, 02 Aug 2017 03:59:53 -0700, alex.jakimenko@gmail.com wrote:
Code:
say (1��).grep(* < 0)[^10]
Given that all of the values are thrown away by grep, I expect the
memory usage to be constant (even though the code will never finish).
However, it seems that there's a leak somewhere.
There's a lot to this, so please see IRC log: https://irclog.perlgeek.de/perl6-dev/2017-08-02#i_14956475
For example, gather-take seems to be leaking as well, and in some
cases it doesn't leak if you remove map, or if you use a range instead
of a sequence�
Found another example without any maps or WhateverCodes that's leaking on 2017.07-87-g6d3ba60 and I'm fairly sure I tried that code a while back (to see if `$a = Seq; for @$a` vs `$a := Seq; for $a` was caching/non-caching) and back then memory didn't grow on this code.
my $a := 1��; for $a {}
And this is the same gather/take issue as binding to an infinite Seq made out of an Iterator instead of gather/take does not leak anything:
my $a := Seq.new: class :: does Iterator { method is-lazy (-->True) {}; method pull-one { 42 } }.new; for $a {}
Migrated from rt.perl.org#131829 (status was 'open')
Searchable as RT131829$
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