[Gambas-user] How to profile memory usage in gambas application ?

[Benoît Minisini]

Le 01/05/2015 20:05, Olivier Cruilles a écrit :
> Hi Benoit, Is there a way to monitor usage of memory of objects
> (Class, Collection, etc...) in Gambas please ? May be you have
> already developed something like time execution profiler already
> existing in Gambas but for memory usage ? My problem is I use an
> Editor object in a project because it is so great to display text
> with numbered lines and other possibilities that it offer but after
> inserted 12000 lines just by Editor1.Text &= new_text_receive, the
> memory usage of my program jump from 65 MB of memory resident to
> around 1GB. So, with a memory profiler in Gambas it will easier to
> find where I need to change my code to optimize space memory. Do you
> think something can be made in this way please ? Thank you Olivier
>

Not automatically, but you can periodically print the number of each
object of each class.

I don't see why the Editor would make the memory consumption jump suddenly.

But doing "Editor1.Text &= new_text" is very stupid, because it extracts
the entire text from the Editor to a new string, creates another new
string by concatenating "new_text", and the result is sent back to the
Editor, and will be parsed so that each line is recreated. The heap
becomes fragmented, and so the heap that is not used anymore cannot be
actually freed.

Use the Insert() method instead. If it makes the memory consumption
going down, you found the guilty code.

Regards,

-- 
Benoît Minisini