> ## Documentation Index
> Fetch the complete documentation index at: https://docs.latitude.so/llms.txt
> Use this file to discover all available pages before exploring further.

# Duration

> Track trace and session duration to investigate latency and long-running conversations.

# Duration

Latitude tracks trace and session duration so you can spot slow interactions, long-running agent workflows, and conversations that take longer than expected.

## Trace duration

A trace is one complete interaction or agent turn. Its duration runs from the first span to the last span.

Use trace duration to find:

* slow LLM responses
* long tool-call chains
* retries or fallback paths
* agent loops
* high-latency production requests

Trace duration appears in the Traces table, trace detail view, search results, and filters.

## Session duration

A session groups related traces into a multi-turn conversation. Its duration is the time covered by those traces.

Use session duration to understand:

* long-running conversations
* support interactions that take many turns
* workflows that span multiple user messages
* sessions where latency accumulates across turns

The Sessions view shows duration alongside session-level cost, time to first token, models, span count, session id, and user id when available.

## Filter by duration

Use duration filters to find slow traces or sessions. Combine them with search and other filters, such as:

* traces with high duration and errors
* expensive traces that also took a long time
* slow traces for a specific model or provider
* long sessions for one user or customer segment
* production traces where users expressed frustration

Duration pairs well with semantic search. For example, search for *agent loops between tools* and filter to high-duration traces to find slow looping behaviours.

## Related

* [Percentile cohorts](./percentile-cohorts): Compare duration against similar tagged traces
* [Traces](../traces): Trace-level duration and span waterfalls
* [Sessions](../sessions): Session-level duration and multi-turn conversations
* [Filters](../filters): Filter by duration
* [Search](../../search/overview): Combine duration filters with behavioural search