17 February 2016 The cause of, and solution to, all your multicore performance problems. There are, of course, only two hard things in computer science: cache invalidation, naming things, and off-by-one errors. But there is another hard problem lurking amongst the tall weeds of computer science: seeing things in order. Whether it be sorting, un-sorting, or tweeting, seeing things in order is a challenge for the ages. One common ordering challenge is memory consistency, which is the problem of de...