In May 2010 we merged support for the RTMP protocol suite into curl, in our desire to support the world’s internet transfer protocols. RTMP The protocol is an example of the spirit of an earlier web: back when we still thought we would have different transfer protocols for different purposes. Before HTTP(S) truly...

In the spring of 2020 I decided to finally do something about the lack of visualizations for how the curl project is performing, development wise. How does the line of code growth look like? How many command line options have we had over time and how many people have done more than 10 commits per year over time? I...

Background: nuget.org is a Microsoft owned and run service that allows users to package software and upload it to nuget so that other users can download it. It is targeted for .Net developers but there is really no filter in what you can offer through their service. Three years ago I reported on how nuget was...

Release presentation Numbers the 273rd release8 changes63 days (total: 10,712)264 bugfixes (total: 13,640)538 commits (total: 38,024)0 new public libcurl function (total: 100)0 new curl_easy_setopt() option (total: 308)0 new curl command line option (total: 273)77 contributors, 48 new (total: 3,619)37 authors, 21...

curl and libcurl are written in C. Rather low level components present in many software systems. They are typically not part of any ecosystem at all. They’re just a tool and a library. In lots of places on the web when you mention an Open Source project, you will also get the option to mention in which ecosystem it...

The Linux Foundation, the organization that we want to love but that so often makes that a hard bargain, has created something they call “Insights” where they gather lots of metrics on Open Source projects. I held back so I never blogged and taunted OpenSSF for their scorecard attempts that were always lame and...

The annual curl users and developers meeting, curl up, takes place May 23-24 2026 in Prague, Czechia. We are in fact returning to the same city and the exact same venue as in 2025. We liked it so much! curl up This is a cozy and friendly event that normally attracts around 20-30 attendees. We gather in a room...

tldr: curl goes back to Hackerone. When we announced the end of the curl bug-bounty at the end of January 2026, we simultaneously moved over and started accepting curl security reports on GitHub instead of its previous platform. This move turns out to have been a mistake and we are now undoing that part of the...

Last spring I wrote a blog post about our ongoing work in the background to gradually simplify the curl source code over time. This is a follow-up: a status update of what we have done since then and what comes next. In May 2025 I had just managed to get the worst function in curl down to complexity 100, and the...

The title of my ending keynote at FOSDEM February 1, 2026. As the last talk of the conference, at 17:00 on the Sunday lots of people had already left, and presumably a lot of the remaining people were quite tired and ready to call it a day. Still, the 1500 seats in Janson got occupied and there was even a group of...

In January 2025 I received the European Open Source Achievement Award. The physical manifestation of that prize was a trophy made of translucent acrylic (or something similar). The blog post I above has a short video where I show it off. In the year that passed since, we have established an organization for how do...

I had the honor and pleasure to hand over this prize to its first real laureate during the award gala on Thursday evening in Brussels, Belgium. This annual award ceremony is one of the primary missions for the European Open Source Academy, of which I am the president since last year. As an academy, we hand out...