Carl-Erik Kopseng fatso83

Download and install p4merge

Download the perforce visual tool suite from here: http://www.perforce.com/perforce/downloads/index.html
Copy only the p4merge.app file into your /Applications/ directory

Setup p4merge as a visual mergetool

Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns
L2 cache reference ........................... 7 ns
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns             
Compress 1K bytes with Zippy ............. 3,000 ns  =   3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns  =  20 µs
SSD random read ........................ 150,000 ns  = 150 µs

Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs

	from abc import ABCMeta, abstractmethod
	import threading


	class ClockInterface(object):
	__metaclass__ = ABCMeta

	@abstractmethod
	def time(self):
	pass