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perf: defer BoltAgent construction to when listener requests it
  • Loading branch information
mwbrooks committed Feb 10, 2026
commit e6e456a88e62e7e9125a2a43fea1e89b5be13235
5 changes: 4 additions & 1 deletion slack_bolt/kwargs_injection/async_utils.py
Original file line number Diff line number Diff line change
Expand Up @@ -58,7 +58,6 @@ def build_async_required_kwargs(
"set_suggested_prompts": request.context.set_suggested_prompts,
"get_thread_context": request.context.get_thread_context,
"save_thread_context": request.context.save_thread_context,
"agent": request.context.agent,
# middleware
"next": next_func,
"next_": next_func, # for the middleware using Python's built-in `next()` function
Expand All @@ -84,6 +83,10 @@ def build_async_required_kwargs(
if k not in all_available_args:
all_available_args[k] = v

# Defer agent creation to avoid constructing AsyncBoltAgent on every request
if "agent" in required_arg_names or "args" in required_arg_names:
all_available_args["agent"] = request.context.agent

if len(required_arg_names) > 0:
# To support instance/class methods in a class for listeners/middleware,
# check if the first argument is either self or cls
Expand Down
5 changes: 4 additions & 1 deletion slack_bolt/kwargs_injection/utils.py
Original file line number Diff line number Diff line change
Expand Up @@ -57,7 +57,6 @@ def build_required_kwargs(
"set_title": request.context.set_title,
"set_suggested_prompts": request.context.set_suggested_prompts,
"save_thread_context": request.context.save_thread_context,
"agent": request.context.agent,
# middleware
"next": next_func,
"next_": next_func, # for the middleware using Python's built-in `next()` function
Expand All @@ -83,6 +82,10 @@ def build_required_kwargs(
if k not in all_available_args:
all_available_args[k] = v

# Defer agent creation to avoid constructing BoltAgent on every request
if "agent" in required_arg_names or "args" in required_arg_names:
all_available_args["agent"] = request.context.agent

if len(required_arg_names) > 0:
# To support instance/class methods in a class for listeners/middleware,
# check if the first argument is either self or cls
Expand Down