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@trevnorris
trevnorris / perf-flame-graph-notes.md
Last active May 25, 2026 19:26
Quick steps of how to create a flame graph using perf

The prep-script.sh will setup the latest Node and install the latest perf version on your Linux box.

When you want to generate the flame graph, run the following (folder locations taken from install script):

sudo sysctl kernel.kptr_restrict=0
# May also have to do the following:
# (additional reading http://unix.stackexchange.com/questions/14227/do-i-need-root-admin-permissions-to-run-userspace-perf-tool-perf-events-ar )
sudo sysctl kernel.perf_event_paranoid=0
@arnaudbreton
arnaudbreton / rsync-auto grunt alternative.coffee
Last active March 25, 2020 04:45
Gruntfile to trigger new Vagrant 1.5 rsync command when catching changes. Faster than Vagrant rsync-auto bundled command, mainly because Grunt only watches specified paths while Guard/Listen (used internally by Vagrant) watches the whole (sub)-folders.
terminal = require('color-terminal')
log = (error, stdout, stderr, cb) ->
if error
terminal.color('red').write stdout
else
terminal.color('green').write stdout
cb()
@madrobby
madrobby / gist:9476733
Created March 10, 2014 23:34
Download a single file from a private GitHub repo. You'll need an access token as described in this GitHub Help article: https://help.github.com/articles/creating-an-access-token-for-command-line-use
curl -H 'Authorization: token INSERTACCESSTOKENHERE' -H 'Accept: application/vnd.github.v3.raw' -O -L https://api.github.com/repos/owner/repo/contents/path
@petemcw
petemcw / brew-instructions.sh
Last active July 14, 2025 23:22
Setup dnsmasq on Mac OS X
# Install `dnsmasq` and configure for *.test domains
$ brew install dnsmasq
$ vim /usr/local/etc/dnsmasq.conf
# Reload configuration and clear cache
$ sudo launchctl unload /Library/LaunchDaemons/homebrew.mxcl.dnsmasq.plist
$ sudo launchctl load /Library/LaunchDaemons/homebrew.mxcl.dnsmasq.plist
$ dscacheutil -flushcache
@gruber
gruber / Liberal Regex Pattern for Web URLs
Last active October 2, 2026 03:54
Liberal, Accurate Regex Pattern for Matching Web URLs
The regex patterns in this gist are intended only to match web URLs -- http,
https, and naked domains like "example.com". For a pattern that attempts to
match all URLs, regardless of protocol, see: https://gist.github.com/gruber/249502
License: https://opensource.org/license/bsd-3-clause
# Single-line version:
(?i)\b((?:https?:(?:/{1,3}|[a-z0-9%])|[a-z0-9.\-]+[.](?:com|net|org|edu|gov|mil|aero|asia|biz|cat|coop|info|int|jobs|mobi|museum|name|post|pro|tel|travel|xxx|ac|ad|ae|af|ag|ai|al|am|an|ao|aq|ar|as|at|au|aw|ax|az|ba|bb|bd|be|bf|bg|bh|bi|bj|bm|bn|bo|br|bs|bt|bv|bw|by|bz|ca|cc|cd|cf|cg|ch|ci|ck|cl|cm|cn|co|cr|cs|cu|cv|cx|cy|cz|dd|de|dj|dk|dm|do|dz|ec|ee|eg|eh|er|es|et|eu|fi|fj|fk|fm|fo|fr|ga|gb|gd|ge|gf|gg|gh|gi|gl|gm|gn|gp|gq|gr|gs|gt|gu|gw|gy|hk|hm|hn|hr|ht|hu|id|ie|il|im|in|io|iq|ir|is|it|je|jm|jo|jp|ke|kg|kh|ki|km|kn|kp|kr|kw|ky|kz|la|lb|lc|li|lk|lr|ls|lt|lu|lv|ly|ma|mc|md|me|mg|mh|mk|ml|mm|mn|mo|mp|mq|mr|ms|mt|mu|mv|mw|mx|my|mz|na|nc|ne|nf|ng|ni|nl|no|np|nr|nu|nz|om|pa|pe|pf|pg|ph|pk|pl|pm|pn|pr|ps
@dysinger
dysinger / idris
Last active August 29, 2015 13:56
HELP I'M NEW TO HASKELL AND CABAL IS KILLING ME!!!
# REMOVE ANYTHING CABAL HAS EVER DROPPED ONTO YOUR SYSTEM
rm -rf ~/.{ghc,cabal}
# UPDATE CABAL
cabal update
# UPGRADE CABAL TO 1.18 (BECAUSE THEY ADDED SANDBOXES)
cabal install cabal-install
export PATH=~/.cabal/bin:$PATH ;# PUT THIS IN YOUR PROFILE
@jmreidy
jmreidy / thread.cljs
Created February 4, 2014 01:32
Clojure threading macors
;Retuns 5
(-> 25
(/ 5))
;Return 1/5
(->> 25
(/ 5))
@rothgar
rothgar / main.yml
Last active April 28, 2025 04:18
Generate /etc/hosts with Ansible
# Idempotent way to build a /etc/hosts file with Ansible using your Ansible hosts inventory for a source.
# Will include all hosts the playbook is run on.
# Inspired from http://xmeblog.blogspot.com/2013/06/ansible-dynamicaly-update-etchosts.html
- name: "Build hosts file"
lineinfile: dest=/etc/hosts regexp='.*{{ item }}$' line="{{ hostvars[item].ansible_default_ipv4.address }} {{item}}" state=present
when: hostvars[item].ansible_default_ipv4.address is defined
with_items: groups['all']
@branneman
branneman / app.js
Last active February 5, 2021 21:58
Node.js application entry-point files
#!/usr/bin/env node
'use strict';
var spawn = require('child_process').spawn;
var args = [
'--harmony',
'app/bootstrap.js'
];