Bitcoin  Tags: privacy, security, other.
You know laws and banks right? Financial constructions, interest rates (the magic multiplication of your money), inflation (the magic disappearing of your money), etc. Transferring money across borders is subject to taxes that I don't even know of (why do they mention donations are tax-deducible on Wikipedia and The Internet Archive?), and your bank usually makes you pay a fee.

Paypal partially fixes this, but they are blocked in over 60 countries. Why? Not because of Paypal's own interest surely; the more users they have, the more money they can make.

IPv6  Tags: networking, tutorials.
Since I couldn't find a clear all-you-need to know guide about IPv6, I'll attempt writing one.

For everyone who doesn't want to know everything about it, I wrote some shorter pieces.
What you need to know as...

PHP's in_array is slow - this works faster  Tags: programming, webdevelopment.
I think this is best explained by example, so here's a simple script to load a file into the memory, removing duplicate lines:
<?php
    $handle = fopen("myfile.txt", "r");
    $lines = array();
    while ($line = fgets($handle))
        if (!in_array($line, $lines))
            $lines[] = $line;
    
    fclose($handle);

This works fine if you don't mind waiting for a minute or ten until it did all the millions of lines. If you're like me, you will probably want to make it run in under thirty seconds.

How does SSL work?  Tags: security, networking.
Crosspost from security.stackexchange.com/questions/how-does-ssl-work.

General

SSL (and its successor, TLS) is a protocol that operates directly on top of TCP. This way, protocols on higher layers (such as HTTP) can be left unchanged while still providing a secure connection. Underneath the SSL layer, HTTP is identical to HTTPS.

When using SSL/TLS correctly, all an attacker can see on the cable is which IP and domain you are connected to, roughly how much data you are sending, and what encryption and compression is used. He can also terminate the connection, but both sides will know that the connection has been interrupted by a third party.

Make Chrome run 4 times faster  Tags: websites, software.
(TL;DR)
I almost filed a support request at Grooveshark for making the site incredibly slow. It's never been fast, but the until very recently I could live with it. Now it took around 70 seconds from the moment the page started loading until I heard sound come out of my speakers.
Also selecting a song in the list (not playing it or anything, just selecting) took a few seconds. Absurd.