program doesn't seem to free memory, linux

[JeanC]

Hello,
My program uses 2 QList's for it's task.

When it is done it goes idle untill the next task, there I try to clean up:

while (!imglist.isEmpty())
	imglist.removeFirst();
while (!reglist.isEmpty())
	reglist.removeFirst();
imglist.clear();
reglist.clear();

while (!imglist.isEmpty())
	imglist.removeFirst();
while (!reglist.isEmpty())
	reglist.removeFirst();
imglist.clear();
reglist.clear();

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But it looks likes the memory is not being freed, top reports a whopping 45 mb still in use.
I tried to use the lists with delete and new but I couldn't find the right syntax.
In stead of

for (int i = 0; i < count; i++)
	{
	reglist[i].translate(-minx, -miny);
	imglist[i] = imglist[i].copy(QRect(minx, miny, width, height));
	}

for (int i = 0; i < count; i++)
	{
	reglist[i].translate(-minx, -miny);
	imglist[i] = imglist[i].copy(QRect(minx, miny, width, height));
	}

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Use something like:

for (int i = 0; i < count; i++)
	{
	reglist[i]->translate(-minx, -miny);
	*imglist[i] = imglist[i]->copy(QRect(minx, miny, width, height));
	}

for (int i = 0; i < count; i++)
	{
	reglist[i]->translate(-minx, -miny);
	*imglist[i] = imglist[i]->copy(QRect(minx, miny, width, height));
	}

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I tried various versions with at() and [] but kept getting errors.

I am most curious though to why it is not releasing all that memory in the first place.

Thanks.