How Fast Is Your Browser?
Click Start to run a suite of CPU computation tests including math operations, array sorting, and string manipulation. See individual and composite scores for your browser's performance.
This benchmark runs three CPU-intensive tasks — trigonometric math, 100K-element array sorting, and string regex manipulation — and produces a composite operations-per-second score.
Modern desktop browsers typically score 50,000–150,000; mobile devices score 10,000–60,000 depending on CPU and JavaScript engine.
What Do Your Results Mean?
| Result | Range | Meaning |
|---|---|---|
| Good | Score above 50,000 | Your browser and CPU handle compute-heavy web apps and complex JavaScript efficiently. |
| Warning | Score 10,000–50,000 | Average performance. Adequate for most websites but may slow down on heavy web applications. |
| Bad | Score below 10,000 | Below average CPU performance in browser. Close background apps, update your browser, or check for thermal throttling. |
Common Issues and How to Fix Them
Score is much lower than expected for your CPU
Close all other tabs and applications during the test. Ensure your device is plugged in (battery saver throttles CPU) and your browser is up to date.
Scores differ significantly between browsers
Each browser uses a different JavaScript engine (V8 in Chrome, SpiderMonkey in Firefox, JavaScriptCore in Safari) with different optimization strategies. This is expected behavior.