cocoalabs

man() {
	env \
		LESS_TERMCAP_mb=$(printf "\e[1;31m") \
		LESS_TERMCAP_md=$(printf "\e[1;31m") \
		LESS_TERMCAP_me=$(printf "\e[0m") \
		LESS_TERMCAP_se=$(printf "\e[0m") \
		LESS_TERMCAP_so=$(printf "\e[1;44;33m") \
		LESS_TERMCAP_ue=$(printf "\e[0m") \
		LESS_TERMCAP_us=$(printf "\e[1;32m") \
			man "$@"

utkarshl

In order to use segtree class defined above, you will need to create a datatype(a struct most likely), which will implement the function merge(). It can also additionally implement split, if you need to define the split operation.
A sample is shown as "struct segtree_node" in the code above.

The segtree has to be instantiated with this defined data type. For example,as 
segtree<segtree_node> s;

You have to first call the init function of the class, which will take 
  int n=number of elements in your array,
  node[] = your inital array,
  identity = an element such that merge(y,identity) = merge(identity,y) = y for all y's.

hellerbarde

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