[Qt-interest] How to clear QVector without releasing memory?

[Schimkowitsch Robert]

Hi,

I have a QVector that I want to re-use many times as a buffer. As the
application is long-running on a low memory device, memory fragmentation
might be an issue.

To keep this in check, I would like to reserve() the QVector once, with
the maximum size I am going to need, and then re-use it without ever
freeing up memory.

The only ways to clear all items from the vector I found will also
deallocate memory.

What is the performace-optimal way to clear a QVector without
deallocating memory? 


Robert Schimkowitsch

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