The folks at TechEmpower having been doing an impressive job of framework benchmarks, now on round 9

With ample network bandwidth, the highest-performing frameworks are further differentiated. Additionally, the Peak test environment uses servers with 40 HT cores across two Xeon E5 processors, and the results illustrate how well each framework scales to high parallelism on a single server node.

HHVM made a top showing under the data updates category.