Why does my game's performance drop the longer I play on mobile?

Likely thermal throttling: the device runs fine at first, heats up over ten or twenty minutes of sustained heavy load, then reduces CPU/GPU performance to cool down, dropping your frame rate. So a game that's smooth initially becomes choppy over a long session. This is caused by your game generating more heat than the device can dissipate, often from uncapped frame rates and constant processing. Capturing performance over full real sessions reveals the throttling-driven degradation that short tests miss.

How do I reduce thermal throttling in my game?

Cut sustained load so the device stays within its thermal envelope: cap frame rates so the GPU isn't maxed unnecessarily (rendering far more frames than needed generates heat for no benefit), throttle background and idle work, and make hot systems efficient. Lowering the steady-state CPU/GPU load reduces heat generation, preventing the throttling that degrades performance over a session. Capture performance over full real sessions to find what runs hot (which short tests miss) and verify performance no longer degrades over time, confirming the device stays cooler.

What Causes Thermal Throttling in Games?

Quick answer: Thermal throttling happens when a device heats up under sustained heavy load and reduces CPU/GPU performance to cool down. The cause is your game keeping the hardware under continuous high load, generating more heat than it can dissipate.

Thermal throttling, where performance drops as a device heats up, is a common cause of degrading performance over a session, especially on mobile. Here's what causes thermal throttling in games.

Why Devices Throttle

Thermal throttling is the device protecting itself: when it gets too hot, it reduces CPU and GPU clock speeds to lower heat, which reduces your game's performance. The heat that triggers it comes from sustained heavy load.

Sustained heavy CPU/GPU load, keeping the hardware working hard continuously, generating heat
Uncapped frame rates, rendering as fast as possible, maxing the GPU and producing heat for no benefit
Constant high processing, heavy work every frame even when unnecessary
Inefficient work, doing more than needed, generating heat without benefit
No throttling of idle/background work, full load even when little is happening
Long sessions, heat accumulating over time until the device throttles

The cause is generating more heat than the device can dissipate, sustained over minutes, until it throttles to cool down, the key is sustained load, not momentary spikes.

Why It Degrades Performance Over Time

Throttling is why performance often degrades the longer a session runs: the device runs fine at first, heats up over ten or twenty minutes of sustained load, then throttles, dropping the frame rate. So a game that's smooth initially can become choppy over a long session.

Bugnet captures performance over full real sessions, so the degradation from thermal throttling, which only appears after sustained play, surfaces in your data. Capturing long-session behavior reveals throttling that short tests miss.

Reducing Thermal Throttling

Reducing throttling means cutting sustained load so the device stays cool: cap frame rates (so the GPU isn't maxed unnecessarily), throttle background and idle work, and make hot systems efficient. Lowering the steady-state load keeps the device within its thermal envelope, preventing the throttling that degrades performance.

Bugnet captures sustained performance across real devices, so you can find what runs hot and verify the device stays cooler after fixes. So thermal throttling comes from sustained heavy load generating more heat than the device can dissipate, and reducing it means cutting constant work so the device doesn't overheat over a session.

Thermal throttling happens when sustained heavy load heats a device until it reduces performance to cool down. The cause is continuous high load, often uncapped frame rates. Cut sustained work so the device stays within its thermal envelope.