| """ | |
| Timer context manager, only used in debug. | |
| """ | |
| from time import time | |
| import contextlib | |
| from typing import Generator | |
| @contextlib.contextmanager | |
| def timer(subject: str = "time") -> Generator[None, None, None]: | |
| """print the elapsed time. (only used in debugging)""" | |
| start = time() | |
| yield | |
| elapsed = time() - start | |
| elapsed_ms = elapsed * 1000 | |
| print(f"{subject} elapsed {elapsed_ms:.1f}ms") |