Without wanting to sound critical of this, they seem to have reinvented long-lived PHP servers. Gearman has allowed you to do this with PHP for almost ten years

Without wanting to sound critical of this, they seem to have reinvented long-lived PHP servers. Gearman has allowed you to do this with PHP for almost ten years now, and it was even the case that you could plug it directly into mongrel2 with 0mq. Fundamentally, it's an idea that works incredibly well - it's amazing that more people don't make use of it....