pydata/pandas — pull request #3397 by cpcloud (2013-04-19 00:20:24+00:00)
Title: ENH: speed up testing when --processes arg is given to test_fast.sh

I know this is a stupid one liner but...this allows the pytables fixtures to be shared, but not split (because PyTables is not reentrant [only reading is thread-safe]), during a test run with multiple processors. I get a 3x speed up (75 secs to 25 secs) just by adding this single class variable.