Profiling Go apps with Blackfire

By Fabien Potencier, on May 20, 2020

Blackfire now supports profiling Go applications.

We’re really excited about supporting the Go language, as Blackfire is an extensive Go user. We’re looking forward to the feedback we’ll get from Go users. The various use cases will definitely help us build an even better product.

Behind the scenes, Blackfire uses the built-in Go profiler data. So you could ask: why build another profiler than the built-in one? What is the added value of Blackfire?

Blackfire, the next-generation profiler for Go

One of the first reasons is that we wanted to offer an appealing, interactive user interface, which would make it nicer to browse through large amounts of data.

Blackfire for Go also brings lots of the other ingredients which made its success on PHP:

  • it makes it easy to instrument code;
  • it offers a built-in security model which enables only designated users to profile a production application;
  • Blackfire is inert (generating zero overhead) as long as it is not triggered;
  • as a consequence, there is no need to remove the Blackfire instrumentation before deploying an application production;
  • it is possible to compare Go profiles to check the impact of code changes;
  • as Blackfire also supports other languages (like PHP and Python), if your stack includes some of them, you will be able to use the same tool for profiling them all.

Sounds great, right? Well, there’s more.

Distributed profiling across languages

Blackfire supports profiling micro-services architectures with its “Distributed Profiling” feature.

In the modern world, it is not un-common to have some Go code call an application written in another language like Python or PHP. In that case, Blackfire can seamlessly profile all your applications and link all profiles, granting an extra level of transparency in how which part of the code contributed to resources consumption, no matter which language it’s written with.

Open Source Code

Want to have a deeper look into how the Blackfire works? The Blackfire probe for Go is Open Source!

Get started now!

Happy Go profiling,

Fabien Potencier

Fabien Potencier is the CEO and founder of He founded the Symfony project in 2004 as he constantly looked for better ways to build websites. Fabien is also the creator of several other Open-Source projects, a writer, a blogger, a speaker at international conferences, and the happy father of two wonderful kids.