Browser Performance Benchmark
Measure JavaScript execution velocity and DOM engine efficiency.
What is Browser Performance Benchmark
The Browser Performance Benchmark is a client-side speed test designed to audit the processing capacity and rendering efficiency of your web browser. By testing both the JavaScript execution thread and the visual layout engine, the benchmark generates a comprehensive health score representing your browser's local processing performance.
Unlike network tests that measure internet throughput, this tool runs stress tests entirely on your local hardware. It runs recursive arithmetic operations and draws thousands of shapes to canvas elements to find performance caps caused by heavy browser profiles, active extensions, or disabled hardware acceleration.
How to Use Browser Performance Benchmark
- Initiate the test sequence: Click the Run Benchmark button to start the analysis.
- Observe the progress cards: Watch the status bars for the **JS Engine Speed** and **Rendering Efficiency** benchmarks. The tool will display active status indicators during execution.
- Keep the page active: Do not switch tabs or minimize your browser window during the benchmark run, as this will pause background execution and skew the results.
- Examine the Health Score: Read the final Health Score (out of 100) displayed inside the circular dashboard.
- Interpret sub-metrics: Check the operations count (ops) in the JS panel and the frames per second (fps) in the rendering panel for granular details.
Key Features
- JavaScript Loop Stress-Testing: Employs prime number algorithms (Sieve of Eratosthenes) to measure operations-per-second capacities.
- HTML5 Canvas Render Check: Renders randomized canvas shapes via requestAnimationFrame loops to measure actual frames-per-second capability under load.
- Dynamic Health Indexing: Formulates a weighted score based on mathematical limits of browser engine capabilities.
- No-Lock Running UI: Displays a warning indicator during active benchmark sweeps to prevent tab closing during calculations.
Common Use Cases
- Browser Profile Auditing: Comparing a clean, extension-free profile with your daily browser setup to check extension bloat.
- Hardware Acceleration Verification: Troubleshooting if GPU acceleration is active and working properly during canvas rendering.
- Browser Engine Testing: Comparing performance metrics between Chromium, Gecko, and WebKit engines on the same machine.
Frequently Asked Questions
Q: What does the "JS Engine Speed" value measure?
A: It runs a JavaScript loop that calculates prime numbers. The resulting "ops" value represents the number of execution cycles completed within a 1000ms window. Higher values indicate faster single-core processor speeds and efficient engine interpreters.
Q: What causes low rendering FPS scores?
A: Low frames-per-second during rendering tests usually point to disabled browser hardware acceleration, outdated graphics drivers, or excessive system tasks consuming graphics memory.
Q: How is the overall "Health Score" calculated?
A: The score is computed using a weighted formula that combines the operations-per-second benchmark score and canvas frame rates, capping the maximum result at 100.
Q: Why should I keep this tab active during testing?
A: Modern web browsers throttle JavaScript execution and rendering loops in background tabs to save battery. Leaving the page pauses the benchmark, producing an inaccurate score.
Privacy & Data Note
This benchmark runs entirely within your browser window using standard client-side scripts. No hardware metrics, execution scores, or user details are logged or transmitted to external databases.