Dave Eddy bahamas10

post-increment vs pre-increment in Node.js

Testing to see which one is faster

Results

pre-increment wins... barely

$ echo 'http://www.daveeddy.com/some/path/here?name=dave' | urlparse | json query.name
dave
$ echo 'http://www.daveeddy.com/some/path/here?name=dave' | urlparse | json pathname
/some/path/here
$ echo 'http://www.daveeddy.com/some/path/here?name=dave' | urlparse
{
  "protocol": "http:",
  "slashes": true,
 "host": "www.daveeddy.com",

di.fm m3u

run this to create m3u files for each free radio station that http://di.fm provides.

do this in a tempdir or something

egrep -o 'http://listen\.di\.fm/public3/.*\.pls' < <(curl -s http://www.di.fm/) | \
while read link; do

libfasttime.so

Testing performance from http://blog.csdn.net/undead/article/details/6447339

Installation

Compile and install the shared object libfasttime.c

redis-server and libfasttime.so

Testing out libfasttime.so with redis-server on SmartOS. see https://gist.github.com/bahamas10/5493551 for info on libfasttime.so.

Benchmarking done with DTrace and redis-benchmark from the redis source code

	var spawn = require('child_process').spawn;

	function exec(args, callback) {
	var out = '',
	err = '',
	child = spawn(args[0], args.slice(1));

	child.stdout.on('data', function(data) {
	console.log('exec got stdout'+out);
	out += data;

	Trace
	at WriteStream.process.stdout.write (/Users/dave/dev/node-latest/index.js:4:11)
	at Object.exports.log (console.js:25:18)
	at Object.keys.forEach.console.(anonymous function) [as log] (/Users/dave/dev/node-latest/node_modules/log-timestamp/index.js:13:14)
	at defaultCb (/Users/dave/dev/node-latest/node_modules/npm/lib/npm.js:205:16)
	at Conf.done (/Users/dave/dev/node-latest/node_modules/npm/node_modules/npmconf/npmconf.js:218:15)
	at Object.oncomplete (fs.js:297:15)
	undefined

	var a = 5,
	count = 100 * 1000 * 1000;

	for (var i = 0; i < count; i++)
	String(a);

	#!/usr/bin/env bash
	#
	# Simply create a flame graph and open it
	#
	# gen-flame.sh <trace file> [ filter ]

	if [[ ! -f "$1" ]]; then
	echo "Usage: ${0##*/} <trace file>" >&2
	exit 1
	fi

	# i suck and always forget this
	block in from any to port = 80

	# more http://wiki.joyent.com/wiki/display/jpc2/Using+IPFilter+Rules