Please excuse me from answering so slowly :
Yes it makes a difference, in gl mode the fps falls from 120 to 50 when prefer-parasite-buffer is set to 0.
Actually, the performance is not so bad, I’m just wondering if this is the best way to do, especially if in the case of a fullscreen pixel shader.
I’m also wondering if there is a transfer if my hardware supports render to an offscreen buffer.
Thanks for answering !