tdebatty

#!/bin/bash

#
# bench.sh
# https://gist.github.com/tdebatty/0358da0a2068eca1bf4583a06aa0acf2
#
# https://cylab.be/blog/351/performance-of-virtual-storage-part-2-qemu
# 
# a wrapper for sysbench
# quick run:

tdebatty

.env (and .env.example):
DB_CONNECTION=sqlite

config/database.php:
connections => sqlite
'database' => __DIR__ . '/../storage/app/db.sqlite',

touch storage/app/db.sqlite

tdebatty

<?php
$context = array();
$proxy = getenv("http_proxy");
if ($proxy !== null) {

    $context['http'] = array(
        'proxy' => str_replace("http", "tcp", $proxy),
        'request_fulluri' => true
    );
}

tdebatty

import java.util.ArrayList;

/**
 * Helper class to perform the sum of a large number of values.
 * A double value in java only has 15 significant digits. Hence, when performing
 * the sum of a large number of double values, the precision of the result
 * may be highly altered. For example, if performing the sum of 1E9 values,
 * the result only has 6 significant digits. This helper class performs the
 * addition using groups of 1E5 values. The result has 10 significant digits,
 * for sums of up to 1E10 values.

tdebatty

// !! this gist was created in 2015, it doesn't work on most modern distributions !!
// e.g: get_ip("eth0");

function get_ip($interface) {
  $interface = escapeshellarg($interface);
  $pattern = "/inet addr:(\d+\.\d+\.\d+\.\d+)/";
  $text = shell_exec("ifconfig $interface");
  preg_match($pattern, $text, $matches);
  return $matches[1];
}

tdebatty

#! /usr/bin/php
<?php
// Allows you to filter which USB devices may be connected to your system

// To find the ID of devices:
// sudo pkill udevd
// sudo udevd --debug

// Setup:
// Save this file to /opt/udev-filter-usb

tdebatty

<?php
/**
 * A PHP implementation of spamsum algorithm
 * https://junkcode.samba.org/ftp/unpacked/junkcode/spamsum/
 *
 * The spamsum algorithm is also used by ssdeep
 * http://ssdeep.sourceforge.net/
 * 
 * Usage:
 * $ss = new SpamSum();

tdebatty

<?php

/**
 * A simple function that uses mtime to delete files older than a given age (in seconds)
 * Very handy to rotate backup or log files, for example...
 * 
 * $dir String whhere the files are
 * $max_age Int in seconds
 * return String[] the list of deleted files
 */

tdebatty

<?php
/* A quick and dirty PHP implemenation of NNDescent algorithm, as proposed in the paper
 * Efficient k-nearest neighbor graph construction for generic similarity measures
 * http://dl.acm.org/citation.cfm?id=1963487
 *
 */

/**
 * The algorithm can be used with any kind of item, as long as some
 * similarity metric is defined