Our Blog

Welcome to the Polar Signals blog where we write about profiling, performance, and company culture.

USDT Probes: A Deep Dive

How we added USDT Probe support to Parca Agent

December 10, 2025 | Tommy Reilly

eBPF

Tracing

USDT

Great Lakes: A Delta Lake Fork

Our updates to Delta Lake Table Format

December 4, 2025 | Thor Hansen

Column Database

Delta Lake

Databases

Questioning an Interface: From Parquet to Vortex

Breaking free from the shackles of interface-imposed performance limitations

November 25, 2025 | Alfonso Subiotto Marqués

Databases

Datafusion

Vortex

Apache Parquet

Custom Labels for Node.js

Correlate Application-Specific Data With Profiles

November 19, 2025 | Brennan Vincent

Correlation

Javascript

Profiling

Continuous NVIDIA CUDA Profiling In Production

Low-Overhead Profiling of GPUs with USDT Probes and eBPF

October 22, 2025 | Tommy Reilly

GPU

Profiling

Parallel Flame Graph Rendering

How we improved our Flame Graph rendering by moving computation to the backend.

September 3, 2025 | Yomi Eluwande

Flame Graphs

Profiling

Data Visualization

Das Problem mit German Strings

And why I don't want my database to choose the best encoding for me (yet)

August 26, 2025 | Alfonso Subiotto Marqués

Databases

Column Database

Datafusion

Apache Arrow

Vortex

OOMProf - Profiling on the Brink

Using eBPF to record your programs dying breathes

August 13, 2025 | Tommy Reilly

BPF

Memory Profiling

OOM