TechEmpower/FrameworkBenchmarks — pull request #789 by achlipala (2014-02-07 23:40:21+00:00)
Title: Upgrade Ur/Web version to fix performance problem

I think I found the performance problem I asked about before, and it should be fixed now in Ur/Web itself. It turned out to be a very expensive security measure that newer GCCs associate with the "%n" printf() specifier!

I'd really appreciate it if you could run a quick sanity benchmarking of the json test with the new Ur/Web version installed. I verified myself in EC2 that it's now competitive with netty, the champion from Round 8. Thanks!!