Felix Zhang FelixZhang

This is unmaintained, please visit Ben-PH/spacemacs-cheatsheet

Useful Spacemacs commands

SPC q q - quit
SPC w / - split window vertically
SPC w - - split window horizontally
SPC 1 - switch to window 1
SPC 2 - switch to window 2
SPC w c - delete current window

Site List

Image Site

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

	#include <unistd.h>
	#include <stdio.h>
	#include <fcntl.h>
	#include <linux/fb.h>
	#include <sys/mman.h>

	int main()
	{
	int fbfd = 0;
	struct fb_var_screeninfo vinfo;

	# 0 is too far from ` ;)
	set -g base-index 1

	# Automatically set window title
	set-window-option -g automatic-rename on
	set-option -g set-titles on

	#set -g default-terminal screen-256color
	set -g status-keys vi
	set -g history-limit 10000

Felix Zhang FelixZhang

Useful Spacemacs commands

Site List

Image Site

Latency numbers every programmer should know

The Worker Pattern

Contents

Introduction