Interplanetary telemetry compression · Rüdiger's Blog
You have large quantities of telemetry or other simply structured JSON data. You want to store it on IPFS in a very space efficient way. Then this is for you.
ipfs  telemetry  metrics  datastructures 
3 days ago
Record, Replay, and Stub HTTP Interactions.
http  netflix  testing  JavaScript 
4 days ago
A cartoon intro to DNS over HTTPS – Mozilla Hacks – the Web developer blog
So let’s look at how DNS over HTTPS and Trusted Recursive Resolver protect our users.
dns  http  internet  networking  primer  learning  mozilla 
24 days ago
A tiny JavaScript debugging utility modelled after Node.js core's debugging technique. Works in Node.js and web browsers
JavaScript  debug  node.js 
24 days ago
A CRDT Primer Part II: Convergent CRDTs · An Abstract Plane
In this post, we’ll look at CvRDTs in detail, starting with how they work in general before implementing a simple example of a grow-only distributed counter.
5 weeks ago
A CRDT Primer Part I: Defanging Order Theory · An Abstract Plane
In this post, I’m going to start from the familiar elements constituting a join semi-lattice and build up to the complete concept. In the next post, I’ll explain how state-based CRDTs work, relying on the lessons we’ve learned from order theory.
CRDT  primer  datastructures 
5 weeks ago
WebSub Hub for IPFS
This is a WebSub (previously known as PuSH, PSHB, or PubSubHubbub) hub for all content on IPFS published under a dnslink or IPNS hash. It accepts hub.topic of IPNS NURI, or a URI with any scheme (including http, https) where the domain name has a published dnslink to an IPFS resource.
6 weeks ago
leaktest - Goroutine Leak Detector
Refactored, tested variant of the goroutine leak detector found in both net/http tests and the cockroachdb source tree.
6 weeks ago
Top 10 Things You Can Do With GraalVM – graalvm – Medium
GraalVM is a universal virtual machine for running applications written in JavaScript, Python 3, Ruby, R, JVM-based languages like Java, Scala, Kotlin, and LLVM-based languages such as C and C++.

GraalVM removes the isolation between programming languages and enables interoperability in a shared runtime. It can run either standalone or in the context of OpenJDK, Node.js, Oracle Database, or MySQL.
jvm  java  vm  Programming  GraalVM 
7 weeks ago
mmproxy - Creative Linux routing to preserve client IP addresses in L7 proxies
mmproxy, a PROXY protocol gateway. mmproxy listens for remote connections coming from an application level load balancer, and spoofs the client IP address. From the application’s point of view, this spoofed connection, coming through mmproxy, is indistinguishable from a real one, connecting directly to the application.
proxy  cloudflare 
8 weeks ago
vizceral is a component for displaying traffic data on a webgl canvas. If a graph of nodes and edges with data about traffic volume is provided, it will render a traffic graph animating the connection volume between nodes.
visualisation  graphs  webGL  canvas 
9 weeks ago
Jepsen: Distributed Systems Safety Research
Jepsen is an effort to improve the safety of distributed databases, queues, consensus systems, etc. We maintain an open source software library for systems testing, as well as blog posts and conference talks exploring particular systems' failure modes.
database  distributed  performance  testing  nosql 
9 weeks ago
mitmproxy - an interactive HTTPS proxy
mitmproxy is your swiss-army knife for debugging, testing, privacy measurements, and penetration testing. It can be used to intercept, inspect, modify and replay web traffic such as HTTP/1, HTTP/2, WebSockets, or any other SSL/TLS-protected protocols.

You can prettify and decode a variety of message types ranging from HTML to Protobuf, intercept specific messages on-the-fly, modify them before they reach their destination, and replay them to a client or server later on.
cli  http  mitm  proxy  tls  debug  webdev  https  pentest 
9 weeks ago
Ceph - a distributed data storage system
a free-software storage platform, implements object storage on a single distributed computer cluster, and provides interfaces for object-, block- and file-level storage.

Ceph aims primarily for completely distributed operation without a single point of failure, scalable to the exabyte level, and freely available.
storage  distributed  distributedsystems  filesystem 
11 weeks ago
- A really simple way to move a stand-alone function/class to a worker thread.
- All calls are made asynchronous. Works great with async/await.
- Only 1.01kB gzipped.
JavaScript  WebWorkers 
12 weeks ago
Rough.js is a light weight (~8k), Canvas based library that lets you draw in a sketchy, hand-drawn-like, style. The library defines primitives to draw lines, curves, arcs, polygons, circles, and ellipses. It also supports drawing SVG paths.
SVG  canvas  sketchy  drawing 
12 weeks ago
Data Laced with History: Causal Trees & Operational CRDTs
If I could figure out a way to develop auto-merging documents, I’d be able to implement sync and collaboration in my apps over CloudKit while using Apple’s first-party sharing UI—all without having to pay for or manage my own servers. So this became my ultimate research goal: a collaborative iPhone text editing demo that synced entirely over CloudKit. (And here’s a spoiler: it worked!)
CRDT  datastructures  computerscience  algorithm 
12 weeks ago
Advanced Operating Systems | Udacity
In this course, we will see all the advances that have led to the state-of-the-art operating system that we know today, covering variety of platforms -- cell phones, multi-core, parallel systems, distributed systems, and cloud computing.
learning  courses 
12 weeks ago
Version SAT
Dependency hell is NP-complete. But maybe we can climb out.
algorithms  versioning  SAT  dependencyManagement 
march 2018
Paradigm shifts for the decentralized Web | Ruben Verborgh
As separate markets for data and apps emerge, Web development needs to adopt a new shape.
distributedsystems  dweb  decentralization  architecture  webdev 
march 2018
CQRS Documents by Greg Young
Greg Young created a fantastic PDF document on CQRS that has been around the internet for quite some time.
CQRS  primer 
march 2018
IPFS: The Decentralized Web Primer
This primer contains a series of Tutorials explaining IPFS, Merkle Trees and the Decentralized Web. It's written and maintained as a gitbook so people can read it in many formats.
ipfs  primer  dapps  p2p  learning  books 
march 2018
Quantum Algorithm Zoo
The Quantum Algorithm Zoo maintains a catalog of all known quantum algorithms – and there are a lot of them! For each algorithm you get the name, speedup, and a short description.
algorithm  quantumcomputing 
march 2018
How to Subvert Backdoored Encryption: Security Against Adversaries that Decrypt All Ciphertexts
Parties cannot simply encrypt ciphertexts of some other encryption scheme, because citizens caught trying to communicate outside the government’s knowledge (e.g. by encrypting strings which do not appear to be natural language plaintexts) will be arrested. The one guarantee we suppose is that the government mandates an encryption scheme which is semantically secure against outsiders: a perhaps reasonable supposition when a government might consider it advantageous to secure its people’s communication against foreign entities.
But then, what good is semantic security against an adversary that holds all the keys and has the power to decrypt?

We show that even in the pessimistic scenario described, citizens can communicate securely and undetectably.
papers  encryption  backdoor  surveillance  steganography  communication 
february 2018
What can a technologist do about climate change? A personal view.
“How do you think the tech community (startup community, or any community) can contribute to tech and/or policy solutions on a global scale?”

The notes below are my attempt to answer that question.
energy  technology  ClimateChange  primer 
february 2018
Feature Visualization
How neural networks build up their understanding of images
ai  deeplearning  machinelearning  visualization  primer  learning  neuralnetworks 
february 2018
MetaMask Hackathon Guide – MetaMask
If you’re new to developing for Ethereum and MetaMask, it can be a daunting task! To make things easier, I’m keeping this article up to date with some useful tips for the first-timer!
MetaMask  Web3  ethereum  primer  tutorial 
february 2018
Introduction to libp2p – Keep Network
Libp2p abstracts the mess of protocols we need to deal with in a decentralized context into a single protocol and handles the punching out of unfriendly networks, negotiating with a variety of gateways, and then effectively connecting with many, many peers.
libp2p  ipfs  p2p  distributedsystems 
february 2018
Inter UI font family
Inter UI is a font for highly legible text on computer screens.
font  typography 
january 2018
Zstandard - Real-time data compression algorithm
Zstandard is a real-time compression algorithm, providing high compression ratios. It offers a very wide range of compression / speed trade-off, while being backed by a very fast decoder (see benchmarks below). It also offers a special mode for small data, called dictionary compression, and can create dictionaries from any sample set. Zstandard library is provided as open source software using a BSD license.
algorithm  compression  zstd  Zstandard  performance 
january 2018
Majority is not Enough: Bitcoin Mining is Vulnerable
We show that the Bitcoin mining protocol is not incentive-compatible.
We present an attack with which colluding miners obtain a revenue larger
than their fair share.
january 2018
Richardson Maturity Model: steps toward the glory of REST
A model (developed by Leonard Richardson) that breaks down the principal elements of a REST approach into three steps. These introduce resources, http verbs, and hypermedia controls.
http  rest  api 
december 2017
Speedment is a Stream ORM Java Toolkit and Runtime
The toolkit analyzes the metadata of an existing legacy SQL database and creates a Java representation of the data model which together with the Speedment runtime allows the user to create scalable and efficient Java applications using standard Java 8 streams without any specific query language or any new API.
java8  java  database  DSL  functional  streaming  ORM 
december 2017
Understanding Ethereum Smart Contracts - Gjermund Bjaanes
This post explains how smart contracts work on the Ethereum Blockchain.

Some technical details in this post are slightly simplified for the sake of clarity, but the concepts are valid.
ethereum  blockchain  smartContracts  primer  learning 
november 2017
Ratpack: Lean & powerful HTTP apps for the JVM
Ratpack is a set of Java libraries for building modern HTTP applications.

It provides just enough for writing practical, high performance, apps.

It is built on Java 8, Netty and reactive principles.
framework  http  java  reactive  netty  jvm 
november 2017
Simple tools to improve your Go code
I’ll go through a list of the ones I find really helpful, please note that this list is not exhaustive.
golang  linter  Programming 
november 2017
A penetration tester’s guide to sub-domain enumeration
Sub-domain enumeration is an essential part of the reconnaissance phase. This blog post covers various sub-domain enumeration techniques in a crisp and concise manner.
dns  pentest  security 
november 2017
Figs | Datalegreya
Datalegreya is a typeface which can interweave data curves with text.
font  typography  visualisation  charts 
november 2017
Git Flight Rules
A guide for astronauts (now, programmers using git) about what to do when things go wrong.
git  cheatsheet  primer 
november 2017
Awesome Go
A curated list of awesome Go frameworks, libraries and software. Inspired by awesome-python.
october 2017
vim-gitgutter - Vim Awesome
A Vim plugin which shows a git diff in the 'gutter' (sign column). It shows whether each line has been added, modified, and where lines have been removed. You can also stage and undo individual hunks.
vim  git 
october 2017
Vim After 15 Years | Ian Langworth’s Things of Variable Interest

fzf and fzf.vim for finding files
ack.vim and ag for searching files
Vim + tmux is the key to victory 🔑
ALE is the new Syntastic because it’s asynchronous
…and lots more. Keep reading.
tmux  vim 
october 2017
Logo Crunch - The multi-resolution logo maker
Logo Crunch is a multi-resolution logo maker, it uses computer vision to make your high-res logo legible at lower resolutions. Use it for a website favicon, iOS app icon or Android app icon.
logo  favicon  webdesign  branding 
october 2017
guetzli: Perceptual JPEG encoder
Guetzli is a JPEG encoder that aims for excellent compression density at high visual quality. Guetzli-generated images are typically 20-30% smaller than images of equivalent quality generated by libjpeg. Guetzli generates only sequential (nonprogressive) JPEGs due to faster decompression speeds they offer.
jpeg  compression  guetzli 
october 2017
Five Command Line Options To Hack The Java 9 Module System - blog@CodeFX
With Java 9, you might end up applying more command line options than ever before – it sure has been like that for me. While doing so I had a few insights that might make your life easier.
java  java9 
september 2017
Monads for Go Programmers
Monads are not just used to hide some error handling, but can also be used for list comprehensions and concurrency, to name but a few examples.
golang  monad  functional 
september 2017
Matrix is primarily characterised as a chat protocol. This protocol is designed to link up existing chat solutions such as XMPP (Jabber), IRC or Mattermost.
matrix  chat  irc  xmpp 
september 2017
TCP servers that run like clockwork | Sahil Muthoo
Go is a great language to write networked services. Such services often depend on TCP for their underlying transport. Understanding how to write robust TCP servers is vital. It helps us understand the underpinnings of stuff we build every day. We learn to appreciate the stack we stand on.
golang  tcp  tutorial 
september 2017
USB-C Compliant Cables
Not all usb-c cables are created the same. Benson Leung at Google has reviewed numerous cables, and there are quite a few non-compliant cables. These cables can result in weird, or even dangerous behavior.

If you have a Nexus 6p, Nexus 5x, or a OnePlus 2, I highly recommend using cables from the following list to save yourself trouble. All cables listed below have been reviewed, and are fully compliant with the USB-C standard.
usb-c  usb  hardware 
september 2017
A collection of (mostly) technical things every software developer should know.
learning  primer  Programming 
september 2017
A Complete Guide to Flexbox
The Flexbox Layout (Flexible Box) module (currently a W3C Last Call Working Draft) aims at providing a more efficient way to lay out, align and distribute space among items in a container, even when their size is unknown and/or dynamic (thus the word "flex").
CSS  webdesign  primer 
september 2017
EqualsVerifier even gives you 100% coverage on equals and hashCode methods.
java  testing 
august 2017
a plugin for Gatling that allows running tests with the ZeroMQ protocol
gatling  zeromq  benchmark 
august 2017
A history of branch prediction from 1500000 BC to 1995
This is a pseudo-transcript for a talk on branch prediction given at localhost, a new talk series organized by RC. This talk was given at Two Sigma Ventures on 8/22/2017.
cpu  hardware  compiler  history  optimization 
august 2017
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