Flamecharts combined with distributed tracing correlation is such an amazing feature! I love inspecting eg. queries that customers run on Polar Signals this way to see if the query is properly utilizing all cores uninterrupted!

Polar Signals@polarsignals.com · last wk.

🔥Flame charts are now GA for all CPU profiles on Polar Signals Cloud. X-axis = wall-clock time, so periodic GC, phase shifts, and lock contention show up as patterns instead of getting averaged out. www.polarsignals.com/blog/posts/2...

We have an open position for a student worker on the Firefox Networking team in Germany. We work on the full stack, from high level HTTP all the way down to TCP / UDP. Some C++, some Rust. Help us fight for an open internet for everyone. https://www.mozilla.org/en-US/careers/position/gh/8068406/

Mozilla Careers — Necko Student Worker — Open Positions

Mozilla is hiring a Necko Student Worker in Remote Canada, Firefox, New Products, Firefox, Core Services, Firefox, Mozilla Foundation, Core Services, Mozilla.org, New…

mozilla.org

The Polar Signals profiler got a major upgrade. New dashboard, and everything is faster and smoother 🚀 We can’t wait for you to try it out! Here's what's new and how we did it: www.polarsignals.com/blog/posts/2...

Our new and faster profiler dashboard | Polar Signals

Learn more about our new and improved profiler dashboard.

polarsignals.com

Polar Signals@polarsignals.com · 4w ago

What if loading a data lake was as simple as writing a SQL query? In our latest engineering deep dive, we explain how we explored loading Great Lakes tables using DataFusion SQL queries in an effort to increase performance. 🚀 🧊 Read the full post: www.polarsignals.com/blog/posts/2...

Less context, better answers. 🔥 The new @polarsignals.com MCP makes smaller, more effective tool calls and iterates on what's actually worth querying. www.polarsignals.com/blog/posts/2...

Iteratively explore your flame graphs with the MCP sandwich tool | Polar Signals

Don't bloat your LLM's context. Let it iteratively explore the parts of your flame graphs that actually matter.

polarsignals.com

Super excited to be experimenting with GPU-accelerated query execution (starting with decoding data on-GPU). We're still learning, but this is very exciting!

Polar Signals@polarsignals.com · last mo.

Two of our favorite things on the blog today: 1) Experimenting with cutting-edge GPU-accelerated columnar storage. 🚀 2) Dogfooding our GPU Profiler. 📊 Let us know what you think! www.polarsignals.com/blog/posts/2...

Ever wondered how a profiler knows which JavaScript function is hot when V8 compiles your code three different ways? Brennan went deep on unwinding and symbolizing V8 stacks across Sparkplug, Maglev, and TurboFan. The detective work behind every flame graph. 🔥 www.polarsignals.com/blog/posts/2...

Profiling Internals: JavaScript on V8 | Polar Signals

How Profilers Work: Part 3

polarsignals.com

Today we're launching the missing piece for GPU profiling in open source. The team has really outdone themselves in this one!

Polar Signals@polarsignals.com · 2mo ago

🚀 Launching today: GPU PC sampling in production. Instruction-level profiling telling you why and where warps stall. Whether it is memory latency, scoreboard waits, or barriers. 🧊 Previously NSight-only territory. Now running in prod with low overhead. www.polarsignals.com/blog/posts/2...

Got to troubleshoot what is probably one of the weirdest/most interesting bugs of my career yesterday and today. This one is probably going to deserve a write-up. Thankfully, we heavily dogfood our product, and as a result, customers had no impact.

We care *deeply* (pun intended) about producing the highest quality data for our customers. Incomplete stacks are never great, check out this super fascinating write-up from Tommy on how we vastly improved unwinding of deep python stacks.

Polar Signals@polarsignals.com · 3mo ago

New Blog Alert! Learn how we overcame eBPF limits to unwind deeply nested PyTorch training stacks and learned some cools things along the way: www.polarsignals.com/blog/posts/2...

Been lightly using a gemma4 26B model with an mlx backend via lm studio and wow it’s incredibly good! Just for some random small chats, but it’s been surprisingly good.

Our new website was created by our friends at pixelpoint.io, highly recommend working with them, they did a phenomenal job! Let me know if you want an intro! polarsignals.com

Do more with less. | Polar Signals

Polar Signals Cloud is an always-on, zero-instrumentation continuous profiling for CPU, GPU, and Memory that helps improve performance, understand incidents, and lower infrastructure costs.

polarsignals.com

Really excited about what Polar Signals Cloud can do in a world where more and more code is written by LLMs. Give the LLMs the context they deserve! Also: Check out our new slick website!

Polar Signals@polarsignals.com · 3mo ago

🤖Using Polar Signals Cloud and Claude Code to autonomously optimize your code every day! 📈 Also: Check out our new website! What do you think? www.polarsignals.com/blog/posts/2...

I wrote about our team’s code review norms, which I am grateful are deeply human.

Oblique@oblique.security · 3mo ago

A coworker disappearing into a cave and coming back with 12,000 lines of code you have to review is cause for a heart attack. But, how do you handle the ever-increasing volume of code reviews? Our engineering team wrote down how we navigate code reviews at Oblique: oblique.security/blog/how-obl...

We've been working on a major schema migration at @polarsignals.com that has unlocked some pretty wild improvements. Apart from a 50% (!!) reduction in storage size thanks to logical compression in vortex.dev, there has been a dramatic improvement in query performance.

Hey @anthropic.com, hear me out: Multi-player claude code sessions. Sharing the same claude code session with my team.

TypeScript users can now enjoy Polar Signals Cloud to the fullest as well!

Polar Signals@polarsignals.com · 4mo ago

Tired of Node.js flamecharts full of `a`, `m`, and `_0x3f2`? We just shipped source maps support for Node.js profiles in Polar Signals Cloud. Just add a plugin to your build pipeline, and your profiles show the real code. Know more: www.polarsignals.com/blog/posts/2...

Shout out to Cursor for (to my knowledge) being the only MCP OAuth client that implements token refreshes! It makes a huge difference for users not having to re-auth all the time.

/buddy off Fun idea, but in practice, annoying and distracting.

We caught up with @bwplotka.dev at KubeCon EU. He's excited about semantic conventions across OTel and Prometheus finally becoming practical, and AI tools changing how open source is built. #KubeCon #OpenTelemetry #Prometheus youtube.com/shorts/QF3Yk...

Bartek Plotka at KubeCon EU 2026 in Amsterdam

YouTube video by Polar Signals

youtube.com

Periodic reminder that O(1) is not equal O(1). Your constant matters.

A historic step for profiling within the OpenTelemetry project!

Polar Signals@polarsignals.com · 4mo ago

🥳 OpenTelemetry Profiling goes Alpha! Check out how to use it with open source Parca and Polar Signals Cloud! 🧊 www.polarsignals.com/blog/posts/2...

We caught up with Felix earlier this week at KubeCon EU, and TODAY he's presenting on the OpenTelemetry profiling signal reaching alpha, together with Florian. 📍 15:15, Hall 8, Room F Profiling as a first-class signal in OTel is huge. Don't miss it!

@metalmatze.de and I are at KubeCon! Hit us up if you wanna chat observability and continuous profiling!

I'll be at KubeCon next week. I don't have many slots left, but if you wanna hang out or chat about profiling and all things observability! DM me, and I'm happy to find time!

At #QConLondon? Check out @asubiotto.com's talk on how we test our database(s) in an effort to not let critical bugs ever hit production! Today at 10:35AM GMT. Location Windsor (5th Fl.) Track Native Languages - and Wasm qconlondon.com/presentation...

QCon London 2026 | A Deterministic Simulation Testing (DST) Journey: From WASM in Go to State Machines in Rust

Get practical inspiration and best practices on emerging software trends directly from senior software developers at early adopter companies.

qconlondon.com

See profiling data right in your IDE/texteditor! (*and* make it available to your favorite AI)

Polar Signals@polarsignals.com · 5mo ago

🚀 Introducing the Polar Signals VS Code extension! See CPU time, memory allocations, and more as inline annotations, right next to your code. Works with Polar Signals Cloud and self-hosted Parca. www.polarsignals.com/blog/posts/2...

This one has been a long time coming, excited to finally have shipped it!

Polar Signals@polarsignals.com · 5mo ago

🔐 With a growing number of customers and more diverse customers, came the need for a more flexible authorization system that can represent any organization. That's what we're shipping today. Check it out on the blog! 🧊 www.polarsignals.com/blog/posts/2...

If you ever wondered how profilers work 🤓

Polar Signals@polarsignals.com · 6mo ago

Ever wondered how profilers work? Check out part one in our series, where we dive into the nitty-gritty details. Let us know what you think! www.polarsignals.com/blog/posts/2...

There has been a really exciting movement in Kubernetes to actually acknowledge datacenter topology, and I don't see enough people talking about it. This one might seem small, but it opens up possibilities for applications needing to care about network topology. kubernetes.io/blog/2025/12...

Kubernetes v1.35: Timbernetes (The World Tree Release)

Editors: Aakanksha Bhende, Arujjwal Negi, Chad M. Crowell, Graziano Casto, Swathi Rao Similar to previous releases, the release of Kubernetes v1.35 introduces new stable, beta, and alpha features.…

kubernetes.io