Àyìnlá Ọmọ́tọ́ṣọ̀ Abdulsalam ayinlaaji

Commit Message Conventions

These rules are adopted from the AngularJS commit conventions.

Goals
Generating CHANGELOG.md
- Recognizing unimportant commits
- Provide more information when browsing the history
Format of the commit message
Subject line

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

#GNU Screen Cheat Sheet

##Basics

ctrl a c -> create new window
ctrl a A -> set window name
ctrl a w -> show all window
ctrl a 1|2|3|… -> switch to window n
ctrl a " -> choose window
ctrl a ctrl a -> switch between window
ctrl a d -> detach window

	# terminfo and termcap for nice 256 color terminal
	# allow bold colors - necessary for some reason
	attrcolor b ".I"
	# tell screen how to set colors. AB = background, AF=foreground
	termcapinfo xterm 'Co#256:AB=\E[48;5;%dm:AF=\E[38;5;%dm'
	# erase background with current bg color
	defbce "on"

	Latency Comparison Numbers (~2012)
	----------------------------------
	L1 cache reference 0.5 ns
	Branch mispredict 5 ns
	L2 cache reference 7 ns 14x L1 cache
	Mutex lock/unlock 25 ns
	Main memory reference 100 ns 20x L2 cache, 200x L1 cache
	Compress 1K bytes with Zippy 3,000 ns 3 us
	Send 1K bytes over 1 Gbps network 10,000 ns 10 us
	Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD