I'd like to share a comment I found on Youtube:
https://www.youtube.com/watch?v=uaZRcZf6lg0
Quote:LILA
2 hours ago
Yes, OpenCL has not really impressed us so far, in particular compared to common multi-threading implementation (i.e. CPU only). In some cases, it even makes issues as various driver implementations were buggy (this is unfortunate as apparently OpenCL has not been a priority for some hardware vendors). This is the reason why this is not enabled by default in GIMP and we even added a big fat warning under the option: "OpenCL drivers and support are experimental, expect slowdowns and possible crashes (please report)."
Anyway feel free to try but for now, this is not considered as the recommended way to run GIMP.
Quote:LILA
5 hours ago
Indeed I just checked in the dev log, this is a very new warning, added just a few weeks ago. So it's not in any released version yet (the warning will be in 2.10.10). You are right.
As for the hype, not to say we don't sometimes put some on specific features (don't blame us, we can get excited by what we do!), but for OpenCL specifically, I think we have been quite timid (since at the opposite, we were not so excited by results here! Of course, I guess some may have been a bit excited at the very start of the OpenCL integration, which is normal). Looking at 2.10.0 release notes (probably the only release news we talked about OpenCL?), we cite it twice (in a huuuuge note), always together with some remark to cool down the hype such as "available for systems with stable OpenCL drivers" or "if OpenCL drivers work well for you". Doesn't sound very hype to me. :-)
Or maybe you mean third party articles, but then we don't control these!
https://www.youtube.com/watch?v=uaZRcZf6lg0