Trusted by market leaders
Why We Built This
Performance optimization requires tools that respect the complexity of the web and the skill of the engineer. Existing dashboards often prioritize marketing features over diagnostic clarity. We built Core/Dash because we wanted something real.
Use this view to audit your global infrastructure. Identify where network latency is degrading user experience and validate the effectiveness of your CDN strategy.
Our Core Beliefs:
The dashboard provides two complementary views of your global traffic:.
- Respect the User's Reality Real users operate on variable 4G networks using budget phones with constrained CPUs. Core/Dash captures this reality by measuring high-fidelity field data directly from the browser. This allows you to optimize for the actual conditions your users face.
- Precision Over Approximations We focus on the distribution. The 75th percentile (p75) and the long tail reveal where the real user experience lives and where revenue loss occurs. These metrics provide a clear picture of your site's true performance.
- Zero Harm A monitoring tool should never be the bottleneck. Our collector is ruthlessly optimized. It is tiny (under 2KB), asynchronous, and uses the `PerformanceObserver` API to passively listen to the browser without blocking the main thread.
The Team Behind the Tool
Core/Dash is built by engineers, for engineers. It was founded by Arjen Karel, a performance specialist who spent years auditing enterprise sites and seeing a need for clearer data. I built Core/Dash to provide the tool I needed in the trenches: fast, precise, and completely transparent.
We give you the raw telemetry you need to do your job. We give you the signal so you can fix the noise.
