Can you give more details on how to reproduce this? When I load the
script and repeatedly execute
f2 '(27x12)(20x12)(13x14)(7x10)(1x12)A'
I don't see any memory increase in J or in Task Manager.
If I put 'echo' in front of the f2, I do see memory increasing, but that
might be because of the file I/O or something. I need a testcase to
show the memory leak.
Henry Rich
On 12/9/2016 10:03 AM, 'Pascal Jasmin' via Beta wrote:
The sample code is fairly quick to run.
I can confirm that the code below grows memory use in task manager after each
run without releasing after a couple of minutes idle.
it does not "leak" with
JVERSION
Engine: j803/2014-10-19-11:11:11
Library: 8.04.15
Qt IDE: 1.4.10/5.4.2
Platform: Win 64
----- Original Message -----
From: 'Pascal Jasmin' via Beta <[email protected]>
To: Beta Forum <[email protected]>
Sent: Friday, December 9, 2016 9:53 AM
Subject: [Jbeta] possible memory leak j805
part 2 of adventofcode day 9, took over 1 hour to run, and in the end was left
with 2gb+ memory use by J.
following was in a file and loaded, though an echo lines just called f2 on a
variable holding input. Perhaps this is faster on earlier versions of J?
issues that might cause a leak:
I am reassigning y, but I am also recursing inside a loop.
I'm not positive this code creates a leak. I will rerun it on my machine too.
I may have done something unrelated (or a different attempt) to consume memory.
JVERSION
Engine: j805/j64/windows
Beta-12: commercial/2016-09-30T15:50:47
Library: 8.05.09
Qt IDE: 1.5.2/5.6.2
Platform: Win 64
f2 =: 3 : 0
o =. 0
while. (# y) > e =. ')' i.~ y do.
b =. '(' i:~ e {. y
i =. ". every 'x' cut y{~ b + >:i. <:e -b
o =. o + b + f2 i expand (>:e )}. y
y =. ({.i) }. (>:e) }. y
end.
o + #y
)
expand =: */@:[ $ {.@[ {. ]
echo f2 '(27x12)(20x12)(13x14)(7x10)(1x12)A'
echo f2 '(25x3)(3x3)ABC(2x3)XY(5x2)PQRSTX(18x9)(3x2)TWO(5x7)SEVEN'
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