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@jboner
jboner / latency.txt
Last active June 1, 2024 18:05
Latency Numbers Every Programmer Should Know
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
@jlong
jlong / uri.js
Created April 20, 2012 13:29
URI Parsing with Javascript
var parser = document.createElement('a');
parser.href = "http://example.com:3000/pathname/?search=test#hash";
parser.protocol; // => "http:"
parser.hostname; // => "example.com"
parser.port; // => "3000"
parser.pathname; // => "/pathname/"
parser.search; // => "?search=test"
parser.hash; // => "#hash"
parser.host; // => "example.com:3000"
@tankchintan
tankchintan / gist:1335220
Last active November 30, 2019 00:17
Procedure for installing and setting Sun JDK Java on Default Amazon Linux AMI
# First verify the version of Java being used is not SunJSK.
java -version
# Get the latest Sun Java SDK from Oracle http://www.oracle.com/technetwork/java/javase/downloads/jdk-7u1-download-513651.html
wget http://download.oracle.com/otn-pub/java/jdk/7u1-b08/jdk-7u1-linux-i586.rpm
# Rename the file downloaded, just to be nice
mv jdk-7u1-linux-i586.rpm\?e\=1320265424\&h\=916f87354faed15fe652d9f76d64c844 jdk-7u1-linux-i586.rpm
# Install Java
#!/usr/bin/env bash
# where do you want couchdb and its deps to be installed
COUCHDB_PREFIX="/opt/couchdb-1.0.1"
# Let's determine the correct arcitecture and choose the installer
if [ "`uname -m`" = "x86_64" ]; then
echo "Using 64-bit installer"
COUCHDB_INSTALLER_DOC_ID="26f246a0fe23d6a53d5326713308f43c"
COUCHDB_INSTALLER_BIN="install-couchdb-1.0.1_rel1-linux-x64.bin"