dimaulupov

#!/bin/bash

# This script downloads and installs Ruby 1.9.3-p194 into Cloud9 workspace.
# It makes possible to use Ruby 1.9 for running apps there instead of default Ruby 1.8.7

# Create this file in a root of your workspace.
# Run in command line: chmod +x install-cloud9.sh
# And: ./install-cloud9.sh
# It will take some time to download and compile libyaml and ruby.
# Adjust ruby version paths according to your needs.

jboner

Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference                           0.5 ns
Branch mispredict                            5   ns
L2 cache reference                           7   ns                      14x L1 cache
Mutex lock/unlock                           25   ns
Main memory reference                      100   ns                      20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy             3,000   ns        3 us
Send 1K bytes over 1 Gbps network       10,000   ns       10 us
Read 4K randomly from SSD*             150,000   ns      150 us          ~1GB/sec SSD