eejbyfeldt commented on pull request #17821:
URL: https://github.com/apache/airflow/pull/17821#issuecomment-905421759
> Nice work! Could you provide steps on how to test the performance locally?
Yes, here is what i did:
In order to run the webserver locally I did the following.
Build and install airflow in a venv
```
$ python -m venv .venv
$ source .venv/bin/activate
$ pip install .
```
initialize the db and add a user
```
$ airflow db init
$ airflow users create \
--username admin \
--role Admin \
--firstname test \
--lastname airflow \
--email '' \
--password admin
```
and compile the static assets in airflow (requires yarn and nodejs)
```
$ airflow/www/compile_assets.sh
```
Then I stated the webserver locally
```
$ airflow webserver
```
The used a browser and went to `localhost:8080` and opened the example dag
of `example_task_group` to get a dag with some task groups. This dag is not
really large enough where it is really slow, but the extra calls to `draw` and
increase render time show up in the performance tab of the developer tools in
Firefox (I am sure other browsers have similar features). I mostly used the
flame chart
(https://developer.mozilla.org/en-US/docs/Tools/Performance/Flame_Chart) to
discover what caused the slowness.
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