[SOLVED] Memory release when apps switched to background

hoanghua

Hi,

I'm writing an application on Meego platform. When the application is switched to background, I want to release as much as memory as possible. What I've been doing so far.

Listening for switch-to-background event
Clear pagestack

However, seems that it doesn't help much (usage memory is still ranged from 50-70MB). Can you suggest any thing that I can do to achieve the target? Our application has lots of images, could it be a reason for using lot of memory? I know the images are cached, but I assumed that it should be freed when the application switched to background.

mbrasser

Hi,

You could try manually triggering garbage collection via gc(). Hopefully future versions of QML/Creator will include some nice tools for analyzing memory usage.

Regards,
Michael

hoanghua

Hi,

Sorry for asking a silly question. On which object/class should I invoke gc()? Trying to google for the answer; but can't find though.

Thanks,

mbrasser

Hi,

gc() is a function on the global object, so you should be able to call it from anywhere. e.g.

@
Component.onCompleted: gc()
...
MouseArea {
onClicked: gc()
}
...
function doSomething() {
gc()
}
...
@

Regards,
Michael

hoanghua

Thanks Michael, works like charm ;-)

Just wonder why this useful tip is not documented anywhere.