➜ pyperf git:(issue225) ✗ ag --py "or newer"
pyperf/_linux_memory.py
13:# Need Linux 2.6.16 or newer.
pyperf/_cpu_utils.py
151: # Python 3.3 or newer?
pyperf/_runner.py
419: print("Use Python 3.3 or newer, or install psutil dependency")
424: print("Use Python 3.3 or newer, or install psutil dependency")
I'm happy to do them. Probably best as a new issue and/or PR.