| #! /bin/bash | |
| array=( $@ ) | |
| len=${#array[@]} | |
| app=${array[$len-1]} | |
| args=${array[@]:0:$len-1} | |
| buffer_file=/tmp/last_heroku_run_`date +%N` | |
| /usr/bin/heroku run "$args; echo \$?" --app $app 2>&1 | tee $buffer_file |
| # I'm no benchmark guru. Just did a bunch of: | |
| $ time ruby <filename> | |
| # Note: This is just an 80mb XML file with 38,000 nodes. | |
| ox_dom.rb 4.56s user 0.78s system 93% cpu 5.714 total (550mb) | |
| ox_dom.rb 4.58s user 0.79s system 87% cpu 6.126 total (550mb) | |
| ox_dom.rb 4.60s user 0.80s system 87% cpu 6.140 total (550mb) | |
| nokigiri_dom.rb 11.75s user 1.02s system 94% cpu 13.518 total (895mb) | |
| nokigiri_dom.rb 11.36s user 1.02s system 93% cpu 13.211 total (895mb) |
| #!/bin/sh | |
| # Credits to: | |
| # - http://vstone.eu/reducing-vagrant-box-size/ | |
| # - https://github.com/mitchellh/vagrant/issues/343 | |
| aptitude -y purge ri | |
| aptitude -y purge installation-report landscape-common wireless-tools wpasupplicant ubuntu-serverguide | |
| aptitude -y purge python-dbus libnl1 python-smartpm python-twisted-core libiw30 | |
| aptitude -y purge python-twisted-bin libdbus-glib-1-2 python-pexpect python-pycurl python-serial python-gobject python-pam python-openssl libffi5 |
| -- show running queries (pre 9.2) | |
| SELECT procpid, age(clock_timestamp(), query_start), usename, current_query | |
| FROM pg_stat_activity | |
| WHERE current_query != '<IDLE>' AND current_query NOT ILIKE '%pg_stat_activity%' | |
| ORDER BY query_start desc; | |
| -- show running queries (9.2) | |
| SELECT pid, age(clock_timestamp(), query_start), usename, query | |
| FROM pg_stat_activity | |
| WHERE query != '<IDLE>' AND query NOT ILIKE '%pg_stat_activity%' |
HTTP Archive (powered by HAR files): www.httparchive.org
HAR Viewer: http://code.google.com/p/harviewer/
| $stack, $draws = [], {} | |
| def method_missing *args | |
| return if args[0][/^to_/] | |
| $stack << args.map { |a| a or $stack.pop } | |
| $draws[$stack.pop(2)[0][0]] = args[1] if args[0] == :< | |
| end | |
| class Array | |
| def +@ |
| XVFB=/usr/bin/Xvfb | |
| XVFBARGS=":1 -screen 0 1024x768x24 -ac +extension GLX +render -noreset" | |
| PIDFILE=/var/run/xvfb.pid | |
| case "$1" in | |
| start) | |
| echo -n "Starting virtual X frame buffer: Xvfb" | |
| start-stop-daemon --start --quiet --pidfile $PIDFILE --make-pidfile --background --exec $XVFB -- $XVFBARGS | |
| echo "." | |
| ;; | |
| stop) |
| ## | |
| # Make Rack look like node. | |
| # | |
| # http://youtu.be/Zp91yUH-zAw | |
| # | |
| # Run like this: | |
| # | |
| # $ unicorn -I. app.ru | |
| require 'node_adapter' |
| if $0.end_with?('/rake') && ARGV[0].start_with?('db:migrate') && Rails.env.development? | |
| #require 'active_record/migration' | |
| klass = | |
| case (adapter_class = ActiveRecord::Base.connection.class.to_s) | |
| when 'ActiveRecord::ConnectionAdapters::SQLite3Adapter' | |
| require 'active_record/connection_adapters/sqlite_adapter' | |
| ActiveRecord::ConnectionAdapters::SQLiteAdapter | |
| when 'ActiveRecord::ConnectionAdapters::Mysql2Adapter' | |
| require 'active_record/connection_adapters/mysql2_adapter' |
| 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 |
