Matouš Jan Fialka mjf

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

	global
	log 127.0.0.1 local2 info
	pidfile /var/run/haproxy.pid
	stats socket /var/run/haproxy.stat mode 600 level admin

	#debug

	defaults
	mode http
	log global

	#! /bin/sed -f

	# pinyin2utf8.sed -- Convert US-ASCII Pinyin to UTF-8
	# Copyright (C) 2012 Matous J. Fialka (mjf), <http://mjf.cz/>
	# Released under the terms of The MIT License
	#
	# DESCRIPTION
	# Script converts all occurences of US-ASCII encoded Pinyin text
	# enclosed by the solidus characters pairs to UTF-8 encoded text.
	#

	clear Lock
	clear Control
	keycode 9 = Caps_Lock NoSymbol Caps_Lock NoSymbol Caps_Lock
	keycode 37 = Escape NoSymbol Escape NoSymbol Escape
	keycode 66 = Control_L NoSymbol Control_L NoSymbol Control_L
	add Lock = Caps_Lock
	add Control = Control_L Control_R

	fs.file-max = 65535
	fs.inode-max = 32768
	fs.suid_dumpable = 0
	kernel.core_uses_pid = 1
	kernel.exec-shield = 1
	kernel.maps_protect = 1
	kernel.msgmax = 65536
	kernel.msgmnb = 65536
	kernel.panic = 30
	kernel.panic_on_oops = 30

	#! /bin/sh

	# Record - record shell session using script(1)
	# Copyright (C) 2011 Matous J. Fialka, <http://mjf.cz/>
	# Released under the terms of The MIT License

	RECORD_PATH="$HOME/.typescripts/%Y/%m/%d"
	RECORD_FILE='%H%M%S'
	RECORD_TIMING_FILE="$RECORD_FILE.timing"

	-- copied from: http://mogmet.blog20.fc2.com/blog-entry-55.html

	select @@GLOBAL.KEY_BUFFER_SIZE + @@GLOBAL.INNODB_BUFFER_POOL_SIZE + @@GLOBAL.INNODB_LOG_BUFFER_SIZE + @@GLOBAL.INNODB_ADDITIONAL_MEM_POOL_SIZE + @@GLOBAL.NET_BUFFER_LENGTH as GLOBAL_BUFFER_SIZE, @@GLOBAL.SORT_BUFFER_SIZE + @@GLOBAL.MYISAM_SORT_BUFFER_SIZE + @@GLOBAL.READ_BUFFER_SIZE + @@GLOBAL.JOIN_BUFFER_SIZE + @@GLOBAL.READ_RND_BUFFER_SIZE as THREAD_BUFFER_SIZE, @@GLOBAL.KEY_BUFFER_SIZE + @@GLOBAL.INNODB_BUFFER_POOL_SIZE + @@GLOBAL.INNODB_LOG_BUFFER_SIZE + @@GLOBAL.INNODB_ADDITIONAL_MEM_POOL_SIZE + @@GLOBAL.NET_BUFFER_LENGTH + (@@GLOBAL.SORT_BUFFER_SIZE + @@GLOBAL.MYISAM_SORT_BUFFER_SIZE + @@GLOBAL.READ_BUFFER_SIZE + @@GLOBAL.JOIN_BUFFER_SIZE + @@GLOBAL.READ_RND_BUFFER_SIZE) * @@GLOBAL.MAX_CONNECTIONS AS TOTAL_MEMORY_SIZE, (@@GLOBAL.KEY_BUFFER_SIZE + @@GLOBAL.INNODB_BUFFER_POOL_SIZE + @@GLOBAL.INNODB_LOG_BUFFER_SIZE + @@GLOBAL.INNODB_ADDITIONAL_MEM_POOL_SIZE + @@GLOBAL.NET_BUFFER_LENGTH + (@@GLOBAL.SORT_BUFFER_SIZE + @@GLOBAL.MYISAM_SORT_BUFF

	/**
	* Strip Juniper Comments
	* Copyright (C) 2011 Matous J. Fialka, <http://mjf.cz/>
	* Released under the terms of The MIT License
	*/

	#include <stdio.h>

	enum {
	ASCII_NUL = '\000',

	#! /bin/sed -f

	# Transform ASCII-art tables into XTerm-art tables
	# Copyright (C) 2011 Matous J. Fialka, <http://mjf.cz/>
	# Released under the terms of The MIT License

	# Horizontal and vertical line crossing
	s/-\|-/-^[(0^On^[(B-/g

	# Top side and vertical line crossing

	#! /bin/sh

	# Posix shell script to connect two shell commands by bi-directional pipe
	# Copyright (C) 2011 Matous J. Fialka, <http://mjf.cz/>
	# Released under the terms of The MIT License

	if [ $# -ne 2 ]
	then
	printf -- 'Usage: bip COMMAND COMMAND\n'
	exit 0