Sunghyun Cho anaclumos

Backend Server Platform

Core stack

Hardware/VM host:
VM:
Operating System:
Data store:
Application Framework:
Application Server:

tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname

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

	#!/usr/bin/env perl
	#
	# slf-viewer.pl - Melon lyrics file viewer
	#
	# Show lyrics from Melon lyrics file (*.slf).
	#
	# Example Usage:
	# ./slf-viewer.pl 소녀시대_태티서-01-Twinkle-320.slf \| less
	#
	# Seungwon Jeong <seungwon0@gmail.com>