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@chriseppstein
chriseppstein / 1_slower_sprite_file.scss
Created December 20, 2010 03:11
This gist demonstrates how a generated sprite file can be optimized to shave some time off your compile.
@import "compass/utilities/sprites/base";
// General Sprite Defaults
// You can override them before you import this file.
$emblem-sprite-base-class: ".emblem-sprite" !default;
$emblem-sprite-dimensions: false !default;
$emblem-position: 0% !default;
$emblem-spacing: 0 !default;
$emblem-repeat: no-repeat !default;
@wadey
wadey / iterm2.zsh
Last active September 7, 2025 22:33
Change iTerm2 tab color when using SSH
# Usage:
# source iterm2.zsh
# iTerm2 tab color commands
# https://iterm2.com/documentation-escape-codes.html
if [[ -n "$ITERM_SESSION_ID" ]]; then
tab-color() {
echo -ne "\033]6;1;bg;red;brightness;$1\a"
echo -ne "\033]6;1;bg;green;brightness;$2\a"
@amscotti
amscotti / login.rb
Created November 22, 2011 00:45
Sample of Sinatra authentication
require 'rubygems'
require 'bcrypt'
require 'haml'
require 'sinatra'
enable :sessions
userTable = {}
helpers do
@timkelty
timkelty / config.rb
Created January 11, 2012 15:28
Compass config.rb
# Note that while this file is in our config folder, it is
# symlinked to our site folders, so paths are relative from there
# Require gems and Compass plugins
# require 'rgbapng'
# require 'compass-fancybox-plugin'
require 'compass-growl'
# General
output_style = :expanded
@jimbojsb
jimbojsb / gist:1630790
Created January 18, 2012 03:52
Code highlighting for Keynote presentations

Step 0:

Get Homebrew installed on your mac if you don't already have it

Step 1:

Install highlight. "brew install highlight". (This brings down Lua and Boost as well)

Step 2:

@jboner
jboner / latency.txt
Last active October 21, 2025 02:20
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
@hellerbarde
hellerbarde / latency.markdown
Created May 31, 2012 13:16 — forked from jboner/latency.txt
Latency numbers every programmer should know

Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns
L2 cache reference ........................... 7 ns
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns             
Compress 1K bytes with Zippy ............. 3,000 ns  =   3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns  =  20 µs
SSD random read ........................ 150,000 ns  = 150 µs

Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs

@justinobney
justinobney / angular-get-service-console.js
Last active April 15, 2021 16:29
Get a reference to some angular service in the console
// Get the injector
var injector = angular.element($0/*'[data-ng-app], [ng-app]'*/).injector();
// Get the service
var Service = injector.get('Service');
// Use it!
// Service.addNotification('Some Notification', 'info');
@namuol
namuol / INSTALL.md
Last active December 11, 2024 12:21
rage-quit support for bash

rage-quit support for bash

HOW TO INSTALL

Put flip somewhere in your $PATH and chmod a+x it.

Copy fuck into ~/.bashrc.

@brianhempel
brianhempel / bench_rails_memory_usage.rb
Last active August 28, 2025 07:07
A script to test the memory usage of your Rails application over time. It will run 30 requests against the specified action and report the final RSS. Choose the URL to hit on line 45 and then run with `ruby bench_rails_memory_usage.rb`.
require "net/http"
def start_server
# Remove the X to enable the parameters for tuning.
# These are the default values as of Ruby 2.2.0.
@child = spawn(<<-EOC.split.join(" "))
XRUBY_GC_HEAP_FREE_SLOTS=4096
XRUBY_GC_HEAP_INIT_SLOTS=10000
XRUBY_GC_HEAP_GROWTH_FACTOR=1.8
XRUBY_GC_HEAP_GROWTH_MAX_SLOTS=0