The testcase that is performing badly for me is the one with 100 positionned transparent images, not the one with 100 positionned empty so it looks like it is not due to the positionning of elements but to the alpha channel of images.
The testcase that is performing badly for me is the one with 100 positionned transparent images, not the one with 100 positionned empty so it looks like it is not due to the positionning of elements but to the alpha channel of images.