I'm trying to run the benchmarks from speed.pypy.org on my system (just with cpython for now -- there is a chance that Linaro will be doing some work on the performance of Python on ARM at some point), but when I check out https://bitbucket.org/pypy/benchmarks/overview and run "./runner.py --fast" I get this:

Running hexiom2...
INFO:root:Running /usr/bin/python /home/mwhudson/src/benchmarks/own/hexiom2.py -n 5
INFO:root:Running /usr/bin/python /home/mwhudson/src/benchmarks/own/hexiom2.py -n 5
Traceback (most recent call last):
  File "./runner.py", line 302, in <module>
    main(sys.argv[1:])
  File "./runner.py", line 283, in main
    full_store=full_store, branch=branch)
  File "./runner.py", line 41, in run_and_store
    results = perf.main(opts, funcs)
  File "/home/mwhudson/src/benchmarks/unladen_swallow/perf.py", line 1617, in main
    bench_result = func(base_cmd_prefix, changed_cmd_prefix, options)
  File "/home/mwhudson/src/benchmarks/benchmarks.py", line 17, in BM
    return SimpleBenchmark(Measure, *args, **kwds)
  File "/home/mwhudson/src/benchmarks/unladen_swallow/perf.py", line 462, in SimpleBenchmark
    return CompareBenchmarkData(base_data, changed_data, options)
  File "/home/mwhudson/src/benchmarks/unladen_swallow/perf.py", line 736, in CompareBenchmarkData
    return CompareMultipleRuns(base_times, changed_times, options)
  File "/home/mwhudson/src/benchmarks/unladen_swallow/perf.py", line 704, in CompareMultipleRuns
    significant, t_score = IsSignificant(base_times, changed_times)
  File "/home/mwhudson/src/benchmarks/unladen_swallow/perf.py", line 189, in IsSignificant
    t_score = TScore(sample1, sample2)
  File "/home/mwhudson/src/benchmarks/unladen_swallow/perf.py", line 170, in TScore
    return (avg(sample1) - avg(sample2)) / math.sqrt(error * 2)
ZeroDivisionError: float division by zero