The functions imageload() and imagestore() seem very slow. imageload() is about 60% slower than texelfetch() through my test. is there any tricks that can accelerate these two functions, in particular, imagestore(http://www.opengl.org/registry/specs...load_store.txt), since imageload() can be substituted by texelfetch().
I have read the spec () many times but have not found any clue.
Thanks in advance.