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// Start with an empty db.

URL with("http://localhost:8080/?action=select&op=pairs") fetch
// ==> []
URL with("http://localhost:8080/dir1?action=mkdir") fetch
URL with("http://localhost:8080/dir1/?action=write&key=k1") post("k1_val")
URL with("http://localhost:8080/?action=select&op=pairs") fetch
// ==> [["dir1",{"k1":"k1_val"}]]

// Now create a key and an empty container

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=SUBSTITUTE("=SUBSTITUTE(@,CHAR(64),CHAR(34)&@&CHAR(34))",CHAR(64),CHAR(34)&"=SUBSTITUTE(@,CHAR(64),CHAR(34)&@&CHAR(34))"&CHAR(34)) 

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#!/bin/bash

# Usage: speedup.sh <input> <output> <frames>
# frames is the number of frames per second (1 = fastest, 10 is slower etc)

mkdir speedup_tmp
ffmpeg -i $1 -r $3 -f image2 speedup_tmp/%05d.png
ffmpeg -i speedup_tmp/%05d.png -b 512000 $2
rm -rf ./speedup_tmp

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Renderer: NVIDIA GeForce 9400M OpenGL Engine
 - RGBA bits: 8880
 - Depth bits: 24
 - Stencil bits: 8
diffuse textured
diffuse
solid
outline
Loaded 110380 tris, 62988 verts, 19369 edges
Add

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Renderer: NVIDIA GeForce 9400M OpenGL Engine
 - RGBA bits: 8880
 - Depth bits: 24
 - Stencil bits: 8
diffuse textured
diffuse
solid
outline
GL Error: INVALID_OPERATION
  - Object.run (https://tinkercad.com/stacktrace.js:74:14)

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web: node server.js

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Prosody XMPP Performance Test

Results of a quick performance test for Prosody - a popular open-source XMPP server.

Server

Prosody v0.7 with libevent enabled

Lua 5.1

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Problem: I needed to test some code that would auto-reconnect to a remote service, without being able to stop/restart the service.

Solution: tcpkill

For example:

apt-get install dsniff

sudo tcpkill -i eth0 port 27017 # no more outgoing connections to Mongodb

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{
  "config": {
    "target": "ws://localhost:8080",
    "phases": [
      {"duration": 120, "arrivalRate": 10}
    ]
  },
  "scenarios": [
    {
      "engine": "ws",

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var minigun = require('minigun-core').runner;

var script = require('./my-test-script.json');

var ee = minigun(script);
ee.on('phaseStarted', function(spec) {}); // fired when a phase begins; spec is the phase definition (from the script)
ee.on('phaseCompleted', function(spec) {}); // fired when a phase completes; spec is as above
ee.on('stats', function(stats) {}); // fired every 10s; stats is a JSON object with stats for the previous 10s
ee.on('done', function(report) {}); // fired when the test completes, report is a JSON object with all stats
ee.run();