Hi all, if you've used any of the things in pyopencl.algorithm (from git, has not yet been in a release), here's an important heads-up: I've made an incompatible change to these interfaces to make sure they support wait_for arguments and return events. In some cases, this means that result tuples have a different length now. (Yes, those should be namedtuple()s, I know. Watch for a related post.) If this affects you, I'm sorry. Andreas