In preparation for running Intel Haswell Gallium3D benchmarks, this weekend I ran some fresh Mesa 9.1.6 vs. 9.2.0 vs. 9.3-devel tests on an Intel Core i7 "Haswell" system with HD Graphics 4600.
These quick weekend tests were done from a System76 Gazelle Pro with Intel Core i7 4900MQ CPU with HD Graphics 4600. The system was running Xubuntu 13.10 with the Linux 3.11 kernel while testing the Mesa 9.1, 9.2, and master Git branches as of Saturday.
The benchmark results for this latest Intel Haswell Mesa testing can be found on OpenBenchmarking.org at 1309082-SO-MESA93GIT43. Embedded below are just a few of the benchmark results, bug long story short, Mesa 9.3 (Git) doesn't appear to have too much in the way of GL performance optimizations over last month's 9.2.0 release.