Expected Behavior

Disable all performance tracking. This feature required for single page application (SPA).

Current Behavior

With disablePerformanceTracking all page views contains old page performance.
Without disablePerformanceTracking first request contains not complete page performance (without DOM info), second request contains full page performance and other next requests does not contain page performance data.

Possible Solution

Additionally check variable configPerformanceTrackingEnabled before calling appendAvailablePerformanceMetrics(request).

Steps to Reproduce (for Bugs)

1. Create single page application;
2. Push disablePerformanceTracking;
3. Track page view — page performance is sent;
4. Change window.location;
5. Track page view — old page performance is sent.

Context

SPA without page reload.

Your Environment

• Matomo Version: 4.2.0
• PHP Version: PHP/7.4.15
  Server Operating System: Docker image matomo:4.2.0
• Additionally installed plugins: none