What follows is the entire contents of a J session which ran out of memory.
This is on a 1G machine on Windows XP Pro.
I was playing with one of the Project Euler problems and wanted to verify
the answer using rationals instead of floats. The solution using floats ran
in about a second. When I converted it to use rationals it went to paging
and eventually ran out of memory. Fair enough. This is a pretty memory
intensive approach.
The problem is that once it ran out of memory nothing of any consequence
worked. Even clicking File/Exit got out of memory. Fortunately 7!:3''
worked, but it took a long time to run as it had to go through a lot of
memory that was paged.
The thing is that there should be plenty of memory available as nothing
beyond the standard libraries were loaded. Is there a memory leak somewhere?
Is it possible that when an out of memory occurs that J forgets to free up
memory? This is on j601/2006-11-17/17:05
x:(x:^:_1]3r7)(_2:{[:(/:~)[:~.]%~[:<.*)>:i.100000
42857r100000
x:(x:^:_1]3r7)(_2:{[:(/:~)[:~.]%~[:<.*)>:i.1000000
428570r999997
x:(x:^:_1]3r7)(_2:{[:(/:~)[:~.]%~[:<.*)>: i.1000000
428570r999997
3r7(_2:{[:(/:~)[:~.]%~[:<.*)>:i.1000000
|out of memory
| (_2:{[:(/:~)[:~.]%~[:<.*)>:i.1000000
x:(x:^:_1]3r7)(_2:{[:(/:~)[:~.]%~[:<.*)>:i.1000000
|out of memory
| x:(x:^:_1]3r7) (_2:{[:(/:~)[:~.]%~[:<.*)>:i.1000000
|out of memory: wdhandler_0_
| wdq=: wd'q'
|out of memory: wdhandler_0_
| wdq=: wd'q'
|out of memory: wdhandler_0_
| wdq=: wd'q'
|out of memory: wdhandler_0_
| wdq=: wd'q'
|out of memory: wdhandler_0_
| wdq=: wd'q'
7!:3''
64 29644938
128 1293
256 342
512 270
1024 84
|out of memory: wdhandler_0_
| wdq=: wd'q'
-------At this point after I copied the session to the clipboard for pasting
into this message I entered 2!:55'' and ended the session.
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