On 6 Feb 2009, at 10:39 am, harry greenmonster wrote:
a pointer address when replaced by another address free's up the old
memory location it once pointed to, no?
No.
It just means you orphaned the object - the memory it occupies is
still err, occupied. However, in this case it's OK to do that in
theory because the string returned by -stringByReplacingCharacters...
is autoreleased, meaning that at some point the autorelease pool will
be drained, cleaning it up. But for strings 5Mb long, you have a
problem.
The question is, at what point? Certainly not within this while loop,
and that's why your footprint is growing.
So, try this:
while( ... )
{
NSAutoreleasePool* pool = [NSAutoreleasePool new];
// ...do your thing...
[pool drain];
}
hth,
--Graham
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