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@hellerbarde
hellerbarde / latency.markdown
Created May 31, 2012 13:16 — forked from jboner/latency.txt
Latency numbers every programmer should know

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

@cooldaemon
cooldaemon / udp_server.erl
Created July 23, 2008 01:53
This is udp server framework for Erlang.
%% @author Masahito Ikuta <cooldaemon@gmail.com> [http://d.hatena.ne.jp/cooldaemon/]
%% @copyright Masahito Ikuta 2008
%% @doc UDP Server Behaviour.
%% Copyright 2008 Masahito Ikuta
%%
%% Licensed under the Apache License, Version 2.0 (the "License");
%% you may not use this file except in compliance with the License.
%% You may obtain a copy of the License at
%%