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Hi,

I found many references to the 'memory leak' in the archived 
messages at http://www.mail-archive.com/perl-win32-
[EMAIL PROTECTED]/.

I believe there isn't a memory leak at all, it appears that the 
memory usage reported by windows task manager includes a 
portion of a windows cache allocated to the program, and that it's 
the cache usage that changes, not the amount of memory that the 
perl interpreter has allocated.
This is based on these observations:
1)      As the memory usage reported by the task manager increases 
the total memory usage does not increase. If you run a compiler or 
something that will allocate memory a bit at a time for a long period 
of time you'll notice that as the compiler's memory usage goes up, 
and so does the total memory usage.
2)      If you minimize the perl-win32-gui app's window the reported 
memory usage goes down to a base value (120K with my perl), and 
every time you minimize the window it goes down to the same 
value. This is _not_ indicative of a memory leak.
3)      If you play with other applications in a similar way you can 
make them exhibit similar behaviour. The reported memory usage 
on other applications (my test was EditPlus) doesn't increase to 
the same extent, but it does increase (more on this difference later).

During the above I looked over the code involved, and attempted to 
isolate a memory leak. So far as I can tell the code is rock solid.


I believe that the difference between a perl-win32-gui application, 
and other pure win32 applications is in the DefWindowProc 
handling. The perl-win32-gui module does call DefWindowProc 
when either you don't have a handler installed, or you return 1, 
however through BoundsChecker I believe that this may not always 
be the case.

I would be interested if someone finds anything else out about this 
problem. Unfortunately I can't spend any more time on this, as it 
appears to me that this isn't a serious bug, at least not something 
that will stop a program from working correctly.



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Sam Jacobson
R & D Manager / Software Engineer
Selective Communications
Ph +64 9 302 1142
www.selective.co.nz

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