mirror of https://github.com/zulip/zulip.git
34 lines
1.1 KiB
Python
34 lines
1.1 KiB
Python
|
|
import cProfile
|
|
|
|
from functools import wraps
|
|
from typing import Any, TypeVar, Callable
|
|
|
|
ReturnT = TypeVar('ReturnT')
|
|
|
|
def profiled(func: Callable[..., ReturnT]) -> Callable[..., ReturnT]:
|
|
"""
|
|
This decorator should obviously be used only in a dev environment.
|
|
It works best when surrounding a function that you expect to be
|
|
called once. One strategy is to write a backend test and wrap the
|
|
test case with the profiled decorator.
|
|
|
|
You can run a single test case like this:
|
|
|
|
# edit zerver/tests/test_external.py and place @profiled above the test case below
|
|
./tools/test-backend zerver.tests.test_external.RateLimitTests.test_ratelimit_decrease
|
|
|
|
Then view the results like this:
|
|
|
|
./tools/show-profile-results test_ratelimit_decrease.profile
|
|
|
|
"""
|
|
@wraps(func)
|
|
def wrapped_func(*args: Any, **kwargs: Any) -> ReturnT:
|
|
fn = func.__name__ + ".profile"
|
|
prof = cProfile.Profile()
|
|
retval = prof.runcall(func, *args, **kwargs) # type: ReturnT
|
|
prof.dump_stats(fn)
|
|
return retval
|
|
return wrapped_func
|