Allan MacGregor has a new post sharing some of his research into getting Magento working on the HHVM (the HipHop VM) and some of the benchmarks of the results.
Magento is (in)famous for its performance, specially when scaling to a large numbers products, transactions or even catalog rules, seasoned Magento developers have probably hit at least one of this performance bottle necks more than once. [...] And while all the optimizations help, in the end there is a major performance bottleneck that is not as easily surpassed and that is PHP performance, since PHP is an interpreted language there is price to pay in terms of speed of execution and overall performance.
He introduces the HHVM briefly for those not familiar with it and some of the work already in progress to make Magento cooperate. He walks you though a complete installation of both the HHVM, cloning it from GitHub, and configuring it with the settings needed for Magento to run correctly. Once the HHVM instance is started, he runs some tests with siege comparing the results from the built-in PHP web server versus the HHVM install.