Penk from the LXDE core team in Taiwan has done a lxde system benchmark test using the lmbench suite.
lmbench is a suite of simple, portable ANSI/C microbenchmarks for UNIX/POSIX. In general, it measures two key features: latency and bandwidth. It is intended to give system developers insight into basic costs of key operations. (http://freshmeat.net/projects/lmbench/)
The results can be seen in the test file here: lxde-benchmark
More benchmark tests can be done with tools from the Linux Benchmark Suite: http://lbs.sourceforge.net
Mario Behling is a German born serial entrepreneur. He founded the lubuntu project, and as the co-founder of FOSSASIA he supports communities to develop open technologies for social change. Mario presently works on SUSI AI from his Singapore base.