delay on device

[zigzagg16]

Hi all,
I'm having a strange issue. In the simulator, no delay to push a view controller.
But on the device, there's a delay of 1 to 2 seconds before the animation starts.. (i0S 6.1.2, iPhone 5)

Here's the code i'm using :

[self.navigationController pushViewController:VC foldStyle:MPFoldStyleUnfold];

Any ideas why i have a delay on the device ?
I really want to use this library in my project, but i can't deliver it with this delay...

[mRs-]

maybe you are loading several stuff on the main thread and it's blocking the foldstyle animation.