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#!/bin/bash | |
# Install build dependencies | |
yum install -y gcc libpng libjpeg libpng-devel libjpeg-devel ghostscript libtiff libtiff-devel freetype freetype-devel | |
# Get GraphicsMagick source | |
wget ftp://ftp.graphicsmagick.org/pub/GraphicsMagick/1.3/GraphicsMagick-1.3.9.tar.gz | |
tar zxvf GraphicsMagick-1.3.9.tar.gz | |
# Configure and compile |
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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 |
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#!/bin/bash | |
echo "*****************************************" | |
echo " Based on information from Google" | |
echo " http://dev.chromium.org/spdy/spdy-best-practices" | |
echo "*****************************************" | |
sudo su | |
yum –y update | |
echo "*****************************************" | |
echo " Changing initcwnd and initrwnd" | |
echo " Step 1: check route settings." |