A Polish Linux user has been uploading many benchmarks recently to our OpenBenchmarking.org cloud platform for test profile/suite/result storage, collaborative result analysis, and other unique features. Over the past few days have been a load of interesting lightweight window manager benchmarks from this individual. All the results are being done from an Intel Pentium B960 system with HD 2000 Graphics and is running Ubuntu 14.04 stock. Through the Phoronix Test Suite he's running many different window managers and a variety of 2D and 3D/OpenGL benchmarks.
Those wishing to check out his results, the most recent result upload earlier today can be found via 1404130-PL-PERFORMAN65. Unfortunately we can't comment much more than that and don't know the individual so can't verify his results but the numbers look accurate and he's been making all of his data publicly available via OpenBenchmarking.org, as is used by thousands of other Linux performance enthusiasts and organizations.
More than 1.6 million benchmarks have been recorded by OpenBenchmarking.org / Phoronix Test Suite in the past three years (not counting the pre-OpenBenchmarking.org PTS days), there's statistics on more than four million computer component configurations, and more than 120k result files. (For those wondering, there's still many planned improvements to OpenBenchmarking.org, but with already having many hands full with the new PTS GUI, the next-generation Phoromatic, and other enterprise features, the OpenBenchmarking.org work is on the long TODO list outside of the commercial custom engineering engagements.)