ios - UIImagePickerController ImageIO_PNG takes massive memory -

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although resize images once uiimagepickercontroller has finished taking photo, instruments profile says calls imageio_png taking massive amounts of memory (40 mb+) each time take photo. code:

- (void)imagepickercontroller:(uiimagepickercontroller *)picker didfinishpickingmediawithinfo:(nsdictionary *)info  {     @autoreleasepool {         if (myimageview.image == nil) {              myimageview.contentmode = uiviewcontentmodescaleaspectfill;              uiimage *topimage = [info objectforkey:@"uiimagepickercontrolleroriginalimage"];              uiimage *image = [info objectforkey:uiimagepickercontrolleroriginalimage];             cgrect rect = cgrectmake(0,0,320,440);              uigraphicsbeginimagecontext( rect.size );             // use local image variable draw in context             [topimage drawinrect:rect];             uiimage *topresized = uigraphicsgetimagefromcurrentimagecontext();             uigraphicsendimagecontext();              myimageview.image = topresized;             image = nil;             info = nil;              [picker dismissviewcontrolleranimated:no completion:nil];             [picker removefromparentviewcontroller];

remove below line code might help:

image = nil; info = nil;

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