iPhone Browser GPU Test Results
iPhone Safari Light-mode reference data, thermal throttling notes and a practical protocol for fair mobile GPU testing.
iPhone browser GPU testing is mostly a thermal and browser acceleration question. Short Light-mode runs can be very stable, while repeated Medium or Heavy runs may drop once the phone warms up.
Test conditions
| Field | Setting |
|---|---|
| Benchmark | Volume Shader BM Test |
| Recommended mode | Light first, then Medium if stable |
| Browser | Safari on iOS |
| Power mode | Low Power Mode off |
| Cooling | Device cool before the recorded run |
| Comparison rule | Compare same mode only |
Reference row
| Device | Browser | Mode | Avg FPS | P10 FPS | Score | Stability |
|---|---|---|---|---|---|---|
| iPhone 15 Pro | Safari | Light | 60 | 56 | 6,000 | 93% |
This row is a Light-mode baseline, not a desktop comparison. Light mode uses a lower shader complexity, so its score should be compared with other Light-mode phone results.
Why scores drop after 30 seconds
Phones have small thermal envelopes. A device can start at high GPU clocks, then reduce clocks when heat builds. This usually appears as a lower P10 FPS, a lower stability percentage, or a visible drop near the end of the run.
How to get a fair iPhone result
Turn off Low Power Mode, close camera and game apps, plug in if battery is low, and avoid testing immediately after charging heat or outdoor sunlight. Run Light mode first. If Light mode is stable, try Medium, then wait before repeating the test.
