\subsection{Timing Context Manager}

Sometimes you simply want to find out, how long a certain code block needs to be executed.

To do that you have different options: Use a third-party package like \lstinline{boxx} or create your own timing context manager based on the standard library.

The following Listing shows you, how you can create your own timing context manager.

In specific, this approach makes use of a generator function (you can implement this context manager based on a class as well).

\lstinputlisting[caption=timing\_context\_manager.py]{../standard_lib/timing_context_manager.py}

As you can see, the code is pretty straightforward.

An example output is shown below.

\begin{lstlisting}[caption=Output of timing\_context\_manager.py]

$ python timing_context_manager.py

Time List Comprehension: 0.5184009075164795

\end{lstlisting}

| timing_context_manager | A simple timing context manager based on a generator function |

import time

from contextlib import contextmanager

def timing(description: str):

start = time.time()

yield

print(f"{description}: {time.time() - start}")

with timing("Time List Comprehension"):

s = [x for x in range(10_000_000)]