Performance Analyzer - Chrome Trace PCA
Upload a Chrome DevTools trace JSON to run PCA and identify which event categories contribute most to latency.
How to use
- 1
Export a Chrome trace
In DevTools Performance tab, record a session and use Save profile to export a JSON trace.
- 2
Upload the trace
Drop the JSON file into the analyzer.
- 3
Review PCA components
The top principal components show which event categories drive the most variance in your trace.
Why use this tool?
- Identifies the top latency contributors via PCA without any server
- Works with standard Chrome DevTools JSON trace format
- Runs fully in-browser using WebAssembly - your trace data stays private
Frequently asked questions
- What trace format is supported?
- Standard Chrome DevTools JSON format - either the {traceEvents: [...]} object or a bare array. Export from DevTools > Performance > Save profile.
- What does PCA show here?
- PCA decomposes per-event-category durations to reveal which combinations of categories co-vary and contribute most to overall trace variance.
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