Why does the work rate change between runs?
Other activity, battery mode, browser scheduling, and device temperature can affect how quickly the workers finish each block. Compare runs only under similar conditions.
PROCESSOR / WORKLOAD
CPU Stress Test.
01 / Worker activityCPU
Ready to test0 / 100
Put your processor to work for a limited time using background workers. Choose the load and duration, and stop whenever you need to.
Work rate—blocks/s
Workers—
Elapsed0 s
Remaining15 s
Temporary browser workload. Stop if your device feels hot or slows down. Results reflect this browser session, not temperature, utilization, or hardware health.
Put your processor to work for a limited time using background workers. Choose the load and duration, and stop whenever you need to.
02 / How it works
How the CPU stress test works
Dedicated browser workers repeat a fixed set of calculations. The rate counts completed work blocks per second in this browser session. The workload ends automatically when the selected time expires.
03 / What it cannot measure
What the result does not show
Work rate is not CPU utilization, clock speed, temperature, or proof of hardware health. Browser scheduling, other apps, power settings, and thermal throttling can all change the result.
Common questions
Can I run this on a phone?
Yes, but start with a light, short run. Stop immediately if the phone feels hot or becomes slow. The test ends automatically after the selected duration.