Does TTFB tracking affect playback performance?

No. TimingDataSourceFactory only wraps the open() call and records the elapsed time. The data passes through a thread-safe NetworkTimingRegistry so there's no blocking on the playback thread.

Do I need to change my ExoPlayer setup to use this?

Minimal changes needed. Pass your existing DataSource.Factory to StreamProbe.wrapDataSourceFactory() and use the returned factory when building your MediaSource. Everything else stays the same.

What exactly is being measured as TTFB here?

The measurement covers the duration of the DataSource open() call for each segment request, which reflects how long the server takes to start responding. It's a per-segment estimate, not a full connection handshake breakdown.

Where does the TTFB data appear in the overlay?

TTFB estimates show up in the Segments tab of the debug overlay, next to the existing per-segment metrics like bitrate and duration.

Stream Probe 0.5.0: Per-Segment TTFB Tracking

Stream Probe introduces per-segment Time To First Byte (TTFB) measurement in this update, giving developers a direct view of server response latency inside the debug overlay.

TL;DR

Version 0.5.0 adds TTFB tracking via a new TimingDataSourceFactory wrapper. Call StreamProbe.wrapDataSourceFactory() to enable it, and TTFB estimates appear alongside other segment metrics in the overlay automatically.

What's New

StreamProbe.wrapDataSourceFactory() public API: single entry point to opt into TTFB measurement without touching playback logic
TimingDataSourceFactory: wraps your existing DataSource.Factory, records the duration of each open() call to capture real network response time
NetworkTimingRegistry: thread-safe registry that bridges I/O thread measurements to the main playback thread safely
Overlay UI update: TTFB estimates now render inline with per-segment data in the Segments tab
SDK version bump: 0.5.0

How to Use

Wrap your existing factory before passing it to the player:

val timedFactory = StreamProbe.wrapDataSourceFactory(yourDataSourceFactory)
// Pass timedFactory to your ExoPlayer MediaSource setup as usual

No other changes needed. TTFB values appear in the Segments overlay once playback starts.

TL;DR

What's New

How to Use

FAQ