perf(sagemaker.py): asyncify hf prompt template check

leads to 189% improvement in RPS @ 100 users

litellm/litellm_core_utils/asyncify.py

@@ -0,0 +1,67 @@
+import functools
+from typing import Awaitable, Callable, ParamSpec, TypeVar
+
+import anyio
+from anyio import to_thread
+
+T_ParamSpec = ParamSpec("T_ParamSpec")
+T_Retval = TypeVar("T_Retval")
+
+
+def function_has_argument(function: Callable, arg_name: str) -> bool:
+    """Helper function to check if a function has a specific argument."""
+    import inspect
+
+    signature = inspect.signature(function)
+    return arg_name in signature.parameters
+
+
+def asyncify(
+    function: Callable[T_ParamSpec, T_Retval],
+    *,
+    cancellable: bool = False,
+    limiter: anyio.CapacityLimiter | None = None,
+) -> Callable[T_ParamSpec, Awaitable[T_Retval]]:
+    """
+    Take a blocking function and create an async one that receives the same
+    positional and keyword arguments, and that when called, calls the original function
+    in a worker thread using `anyio.to_thread.run_sync()`.
+
+    If the `cancellable` option is enabled and the task waiting for its completion is
+    cancelled, the thread will still run its course but its return value (or any raised
+    exception) will be ignored.
+
+    ## Arguments
+    - `function`: a blocking regular callable (e.g. a function)
+    - `cancellable`: `True` to allow cancellation of the operation
+    - `limiter`: capacity limiter to use to limit the total amount of threads running
+        (if omitted, the default limiter is used)
+
+    ## Return
+    An async function that takes the same positional and keyword arguments as the
+    original one, that when called runs the same original function in a thread worker
+    and returns the result.
+    """
+
+    async def wrapper(
+        *args: T_ParamSpec.args, **kwargs: T_ParamSpec.kwargs
+    ) -> T_Retval:
+        partial_f = functools.partial(function, *args, **kwargs)
+
+        # In `v4.1.0` anyio added the `abandon_on_cancel` argument and deprecated the old
+        # `cancellable` argument, so we need to use the new `abandon_on_cancel` to avoid
+        # surfacing deprecation warnings.
+        if function_has_argument(anyio.to_thread.run_sync, "abandon_on_cancel"):
+            return await anyio.to_thread.run_sync(
+                partial_f,
+                abandon_on_cancel=cancellable,
+                limiter=limiter,
+            )
+
+        return await anyio.to_thread.run_sync(
+            partial_f,
+            cancellable=cancellable,
+            limiter=limiter,
+        )
+
+    return wrapper