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The Test Page Runs Really Slowly And Stutters On My Phone
Your phone is not too old. The readings jumping is the page struggling, not your stick, so treat those results as unreliable. Close other tabs, use…
Isabela CostaVerified Gamepad Tester team member
Front-End Performance Engineer at Gamepad Tester
Keeps the tests light enough to run smoothly on a low-end phone.
Isabela works on graphics performance. A test that polls a controller continuously and repaints an SVG on every frame can saturate a budget phone's CPU, and once the frame rate drops the readings stop being trustworthy. Her work is keeping the overlays and animations cheap: minimal repaints, fewer live nodes, and a render path that degrades gracefully instead of stuttering.
On Gamepad Tester she is responsible for the performance of the tools on mobile and low-end devices.
- Hands-On
- Owns the render and CPU budget for the test tools on mobile and low-end hardware.
- Answers On Gamepad Tester
- 1
What Isabela Works On
Rendering performanceSVG optimisationlow-end device supportCPU and frame budget
Tests Isabela Looks After
Gamepad TesterLive test of every button, stick, trigger and axis on any controllerFree · Open tool Button TestCheck each button for response, double presses and dead inputsFree · Open tool
Questions Answered By Isabela
The Team Behind These Answers
Calder WrightFront-End Web Architect And Gamepad API Lead
Elena RostovaHardware Diagnostics Engineer
Garrett LindsayHardware Reviewer And Input Performance Specialist
Venom’s Tech (Abhishek)Peripheral Reviewer And Tech Journalist
Chloe HendersonHall Effect And Thumbstick Analyst
Thiago AlvesHardware Repair Educator
Devon MillerLow Latency And Input Timing Engineer
Liam DaviesBluetooth And Wireless Test EngineerEach answer is written by the specialist who owns that part of the hardware, tested on a real controller, and checked by a second team member. How we verify answers