Skip to main content
When you open a trace whose root span hasn’t ended yet, TraceRoot streams new spans into the viewer as they arrive. There is no toggle and no SDK flag — live tracing is on by default for every in-flight trace.
TraceRoot trace viewer streaming new spans live while an agent runs

​
How spans arrive

Spans are merged into the existing tree by span ID, so they can arrive in any order:
  • Newly started spans appear as pending rows (greyed out, no duration yet).
  • When a pending span finishes, its end time fills in and the row renders normally.
  • The Timeline View updates in step — bars extend and new bars appear.
Once the root span completes, the viewer makes a final consistency pass and stops streaming.