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@jhclark
jhclark / latency.txt
Created May 31, 2012 19:58 — forked from jboner/latency.txt
Latency numbers every programmer should know
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
Send 1K bytes over 1 Gbps network 10,000 ns 0.01 ms
Read 1 MB sequentially from memory 250,000 ns 0.25 ms
Round trip within same datacenter 500,000 ns 0.5 ms
Read 1 MB sequentially from SSD 1,000,000 ns 1 ms 4X memory
@adamjmurray
adamjmurray / gist:3154437
Created July 21, 2012 03:18
Managing Ruby gems programmatically
# Environment, set GEM_HOME & GEM_PATH. For example, we can launch JRuby like this:
# GEM_HOME=/Users/amurray/tmp/gems/ GEM_PATH=/Users/amurray/tmp/gems java -jar ~/Downloads/jruby-complete-1.7.0.preview1.jar -S irb
# =====================
# LISTING gems
puts Gem::Specification.find_all.to_s
puts Gem::Specification.find_all.map{|spec| "#{spec.name} (#{spec.version})" }
# =====================
# USING (a specific version of) gems
@smougenot
smougenot / A_Logstash.conf
Created July 26, 2012 13:59
Logstash Multiline Filter for Java Stacktrace (tested on field)
# stacktrace java as one message
multiline {
#type => "all" # no type means for all inputs
pattern => "(^.+Exception: .+)|(^\s+at .+)|(^\s+... \d+ more)|(^\s*Caused by:.+)"
what => "previous"
}
@piscisaureus
piscisaureus / pr.md
Created August 13, 2012 16:12
Checkout github pull requests locally

Locate the section for your github remote in the .git/config file. It looks like this:

[remote "origin"]
	fetch = +refs/heads/*:refs/remotes/origin/*
	url = git@github.com:joyent/node.git

Now add the line fetch = +refs/pull/*/head:refs/remotes/origin/pr/* to this section. Obviously, change the github url to match your project's URL. It ends up looking like this:

@cespare
cespare / log.go
Created October 31, 2012 06:51
Golang apache logging
type ApacheLogRecord struct {
http.ResponseWriter
ip string
time time.Time
method, uri, protocol string
status int
responseBytes int64
elapsedTime time.Duration
}
@nateware
nateware / haproxy.conf
Created October 31, 2012 15:36
HAProxy sample config for EC2
#
# This config file is a combination of ideas from:
# http://www.37signals.com/svn/posts/1073-nuts-bolts-haproxy
# http://www.igvita.com/2008/05/13/load-balancing-qos-with-haproxy/
# http://wiki.railsmachine.com/HAProxy
# http://elwoodicious.com/2008/07/15/nginx-haproxy-thin-fastcgi-php5-load-balanced-rails-with-php-support/
# http://upstream-berlin.com/2008/01/09/using-haproxy-with-multiple-backends-aka-content-switching/
# http://wiki.railsmachine.com/HAProxy
# http://gist.github.com/raw/25482/d39fb332edf977602c183194a1cf5e9a0b5264f9
#
@garlandkr
garlandkr / rsyslog_client.conf
Last active February 24, 2016 12:30
rsyslog with json template for logstash
$template enhanced,"{\"event\":{\"p_proc\":\"%programname%\",\"p_sys\":\"%hostname%\",\"time\":\"%timestamp:::date-rfc3339%\"},\"message\":{\"raw_msg\":\"%rawmsg%\"}}\n",json
*.* @@logcenter:5514;enhanced
@jweir
jweir / redis-eventsource.go
Last active April 19, 2021 03:08
Example of using Redis PubSub and EventSource with golang
package main
import (
eventsource "github.com/antage/eventsource/http"
redis "github.com/vmihailenco/redis"
"log"
"net/http"
)
func haltOnErr(err error){
@mattn
mattn / upload.go
Last active August 3, 2021 05:26
package main
import (
"crypto/sha1"
"fmt"
"io"
"mime/multipart"
"net/http"
"os"
"path/filepath"
@jimothyGator
jimothyGator / README.md
Last active October 4, 2026 13:55
Nginx configuration for Mac OS X with Homebrew, using sites-enabled directory.
mkdir -p /usr/local/etc/nginx/sites-{enabled,available}
cd /usr/local/etc/nginx/sites-enabled
ln -s ../sites-available/default.conf
ln -s ../sites-available/default-ssl.conf

File locations:

  • nginx.conf to /usr/local/etc/nginx/
  • default.conf and default-ssl.conf to /usr/local/etc/nginx/sites-available
  • homebrew.mxcl.nginx.plist to /Library/LaunchDaemons/