Felix Geisendörfer

🚀 fgprof is a sampling Go profiler that allows you to analyze On-CPU as well as Off-CPU (e.g. I/O) time together.

A guide for styling your node.js / JavaScript code. Fork & adjust to your taste.

A node.js client for controlling Parrot AR Drone 2.0 quad-copters.

A node.js package for Steven Levithan's excellent dateFormat() function.

Package httpsnoop provides an easy way to capture http related metrics (i.e. response time, bytes written, and http status code) from your application's http.Handlers.

A tutorial for debugging memory leaks in node

fgtrace is an experimental profiler/tracer that is capturing wallclock timelines for each goroutine. It's very similar to the Chrome profiler.

Talk outline: Faster than C? Parsing binary data in JavaScript.

A tiny & fast key value store with append-only disk log. Ideal for apps with < 1 million records.

Get v8 stack traces as an array of CallSite objects.

sqlbench measures and compares the execution time of one or more SQL queries.

My unofficial and opinionated guide to node.js.

A new CouchDB module following node.js idioms

A sandboxed node.js module loader that lets you inject dependencies into your modules.

An easy way to require all files within a directory.

Go package tcpkeepalive implements additional TCP keepalive control beyond what is currently offered by the net pkg.

A node.js module for delivering static files.

GoDrone is a free software alternative firmware for the Parrot AR Drone 2.0.

Building static empires with node.js.

No description.

A stream that emits multiple other streams one after another.

A node.js module that helps with stubbing and behavior verification.

Auth for people who hate the Auth component

Simplified cross compiling for node.js using vagrant.

A readable file stream for files that are growing.

A node.js client for graphite.

A PID controller implementation in Golang.

Code for decoding and encoding runtime/trace files as well as useful functionality implemented on top.

A node.js module for creating m3u / m3u8 files.

sprof is the next revolution in Go profiling

MIT licensed code without warranty ; )

A PostgreSQL EXPLAIN ANALYZE visualizer with advanced quirk correction algorithms.

Buffers events from a stream until you are ready to handle them.

A redis implementation written in Go.

A node.js irc bot that logs a channel

A simple way to cache and replay readable streams.

The history of this repo demonstrates how to take a slow xxd implementation in Go, and make it faster than the native version on OSX/Linux.

The minimal unit testing library.

No description.

No description.

No description.

Parrot AR Drone 2.0 drivers and protocols written in Go.

My setup. Pick what you like.

Generates require functions that act as if they were operating in a given path.

Experimental go stack unwinding using frame pointers.

A module to read / write binary data and streams.

The minimal test runner.

A fast and streaming multipart parser.

Node.js bindings for non-portable *nix functions

No description.

Test one thing at a time, fake the rest.

Utilities for using bash from node.js.

pgmigrate implements a minimalistic migration library for postgres.

Unit testing done right.

WIP

Proof of concept - Long polling message queue with CouchDB for persistence.

A hack so unbelievably ugly, yet so hard to resist

Abstraction for exponential and custom retry strategies for failed operations.

Quickly clone git repositories into a nested folders like GOPATH.

Advent of Go Profiling 2021.

A guide for anybody interested in contribution to my open source projects.

A general purpose comet server written in node.js

A module to (safely) obfuscate all occurrences of the string 'ActiveX' inside any JavaScript code.

Command gotraceanalyzer turns golang tracebacks into useful summaries.

Measure the overheads of various observability tools, especially profilers.

Nothing to see here yet ...

Are your tests fast or slow? A pragmatic testing framework.

A stateless socket that always lets you write().

Prints a list of all runtime/metrics and their properties.

Code repository for the Raleigh, NC CakePHP workshop

Dojo deferreds as a nodejs module - Work in Progress

WIP

ry/master + patches I am working on / find useful **REBASE TERRITORY - FORK WITH CAUTION**

Simple & light-weight oop.

A WebSocket / LongPolling simulation to estimate users / core

Verifies windows store receipts.

Node.js image resizing demo. One version with and one version without in-memory caching.

https://github.com/felixge/node-far

Bash scripts for controlling an AR Drone over the internet via ssh tunneling.

Mirror of https://gpac.svn.sourceforge.net/svnroot/gpac/trunk/gpac + my patches

An example of a passthrough stream for node.js

A little tool to record and replay http requests.

A kickass test suite for node.js

proftest is a C application for testing the quality of different operating system APIs for profiling.

A code dump of things not worth putting into their own repo.

Isolate workers so they only handle one request at a time. Useful for file uploads.

No description.

My site and blog.

WIP

No description.

A small arm64 SIMD adventure for gophers.

A simple application to show how to use dd-trace-go's tracer and profiler.

No description.

Nothing to see here yet.

No description.

No description.

node.js command-line interfaces made easy

A simple node.js redis pool.

WIP

A replacement for grep for programmers

A robocom inspired programming game for JavaScript

New line separated JSON streaming parser and stringifier

Async utilities for node and the browser

No description.

No description.

REST client library for node.js

not ready yet

Linguistics module for Node - inflection, transformation, i18n and more

Report exceptions to Hoptoad from node.js.

Utilities for dealing with stack traces & errors in node.js.

Generates non-RFC compliant unique ids.

Hash data structure manipulation functions

a package manager for node

Node Logging class supporting multiple log levels and log rotation

Connect is a middleware layer for Node.js

Realtime application framework for Node.JS, with HTML5 WebSockets and cross-browser fallbacks support.

OpenCV Bindings for node.js

Hello world vanity benchmark for node's http parser.

This library implements the TaskPaper file format in Go.

Felix Geisendörfer's Open Source & Work History

No description.

ASCII tables for Go programs.

Restarts a given node script until it fails.

Librato adapter for measured. Not ready yet.

No description.

Bookmark Bar Shortcuts for Google Chrome

A CouchDB interface for node.js

a javascript DSL for building async web apps

Simple XML to JavaScript object converter.

Extended Javascript for Pros

Evented JavaScript for the browser

Node.JS multi-core server manager with plugins support.

Fast and simple Javascript-based XML generator/builder for Node projects.

An XML builder for node.js

platform layer for node.js

A metrics library for Node.js

Test spies, stubs and mocks for JavaScript.

No description.

VoltDB

A node.js app for organizing beach volleyball games.

Long stacktraces for V8 implemented in user-land JavaScript.

Historic #nodejs IRC logs.

A collection of bash functions and conventions for creating applications that can bundle all their code and dependencies inside a tar file.

WIP

Your CLI home video recorder 📼

Fork of golang.org/x/exp.

The production-scale datacenter profiler (C/C++, Go, Rust, Python, Java, NodeJS, .NET, PHP, Ruby, Perl, ...)

nothing to see here yet

No description.

pprof is a tool for visualization and analysis of profiling data

redis client for node

The CFP for the next Nodejs conference (Brescia, Italy - Autumn 2012)

No description.

WIP

A node.js client for webdriver/selenium 2.

A JavaScript library for communicating asynchronously with remote objects using promises.

Realtime video feed from ar.parrot 2.0 drones in pure javascript. Successor of nodecopter-stream.

Verifies windows store receipts.

Alternative JSON parser for Go that does not require schema (so far fastest)

No description.

Go library for accessing the GitHub API

BCC - Tools for BPF-based Linux IO analysis, networking, monitoring, and more

Mappings to manage GitHub-like task lists

The new home of the CUE language! Validate and define text-based and dynamic configuration

No description.

Give your AI agent a Pup — a CLI companion with 200+ commands across 33+ Datadog products.

AI agent toolkit: coding agent CLI, unified LLM API, TUI & web UI libraries, Slack bot, vLLM pods

Call MCPs via TypeScript, masquerading as simple TypeScript API. Or package them as cli.

Token-efficient MCP adapter for Pi coding agent

OpenTelemetry Collector

A Model Context Protocol Server that allows you to interact with your MacOS Calendar through natural language.

A Go Client Library for the Google Flights API

Contrib repository for the OpenTelemetry Collector

No description.

Profiling SIG utilities

GopherCon Slides

The Go programming language

Seelog is a native Go logging library that provides flexible asynchronous dispatching, filtering, and formatting.

No description.

Machine management for a container-centric world

A Git-compatible VCS that is both simple and powerful

Protobuf definitions for the OpenTelemetry protocol (OTLP)

🧸 A Hugo theme based on »Bear Blog«. Free, no-nonsense, super-fast blogging. This theme now includes a dark color scheme to support dark mode 🦉 ⬛️!

Go support for Google's protocol buffers

Experimental symbolizer for cgo backtraces

No description.

Data Processing benchmark featuring Rust, Go, Swift, Zig etc.

Stacked Pull Requests on GitHub

No description.

No description.

Go execution trace frontend

Give PostgreSQL ability to manually force some decisions in execution plans.

A minimalist, responsive, and open-source two-column theme for the Ghost publishing platform

WIP

Molecule is a Go library for parsing protobufs in an efficient and zero-allocation manner.

No description.

Find, Filter, Preview, Pick. All lua, all the time.

depaware makes you aware of your Go dependencies

No description.

just testing some stuff