PTV Map&Guide – next generation: High CPU load / slow map rendering

Symptom
The map display is slow, or CPU usage is unusually high when working with PTV Map&Guide – the next generation.

Cause
For rendering, PTV Map&Guide – the next generation uses WebGL, which is supported by default for graphics rendering in all common browsers. A GPU is recommended for rendering. However, in terminal server environments, a GPU is often not enabled or not available.
If GPU acceleration is missing, graphics must be computed by the CPU – this noticeably increases CPU load.

Check: Is the browser using a GPU?

1. Open the Chrome browser.
2. In the address bar at the top, enter chrome://gpu and confirm with Enter.
3. Check the entries for WebGL and WebGPU:
   • "Hardware accelerated" → GPU acceleration is active (ideal state).
   • "Software only, hardware acceleration unavailable" → No GPU is available; graphics are being computed by the CPU.

Resolution
If "Software only, hardware acceleration unavailable" is displayed: Check together with your IT department whether a GPU can be enabled in your terminal server environment to reduce CPU load.