Adding Langsmith trace processor introduces huge latency to chat

[kmariunas]

Describe the bug

Hey, when we add a langsmith trace processor, our latency goes through the roof. We have a suspicion, that tracing is not done asynchronously. Is there a way to make it async?

This is before and after we removed langsmith (but kept openai) tracing:

Debug information

• Agents SDK version: (e.g. v0.0.6)
• Python version (e.g. Python 3.12.8)

Repro steps

from agents import (
    add_trace_processor,
)
from langsmith.wrappers import OpenAIAgentsTracingProcessor
add_trace_processor(OpenAIAgentsTracingProcessor())

Expected behavior

Tracing does not intrduce any latency to the system

[rm-openai]

@baskaryan, you added this integration - any ideas?

Tracing isn't sync. It gathers events on the same thread/task, but the expectation is that exports occur in the background.

[angus-langchain]

Hi @kmariunas, thanks for reporting. This does look like an issue with how we're tracing this specific integration. Mind creating an issue on the LangSmith SDK repo to follow up. In the meantime I'll work on a fix

[angus-langchain]

@kmariunas Released a fix for this in v0.3.33 of the LangSmith Python SDK

[rm-openai]

Closing this out - thanks @angus-langchain!