To run the benchmarks php app.php inside the Docker environment:
docker-compose run --rm wordpress php app.php
or on your host machine:
php app.php
which would produce the following results:
Testing "file_put_contents".
Testing "file_exists".
Testing "require".
Testing "file_get_contents".
Testing "file_exists non-existant".
Results for 10000 runs:
Test "file_put_contents" took 5.268262 seconds.
Test "file_exists" took 0.535983 seconds.
Test "require" took 3.596618 seconds.
Test "file_get_contents" took 3.717043 seconds.
Test "file_exists non-existant" took 0.511945 seconds.