Very slow cold-start
{'login': 'AmitMY', 'id': 5757359, 'node_id': 'MDQ6VXNlcjU3NTczNTk=', 'avatar_url': 'https://avatars.githubusercontent.com/u/5757359?v=4', 'gravatar_id': '', 'url': 'https://api.github.com/users/AmitMY', 'html_url': 'https://github.com/AmitMY', 'followers_url': 'https://api.github.com/users/AmitMY/followers', 'following_url': 'https://api.github.com/users/AmitMY/following{/other_user}', 'gists_url': 'https://api.github.com/users/AmitMY/gists{/gist_id}', 'starred_url': 'https://api.github.com/users/AmitMY/starred{/owner}{/repo}', 'subscriptions_url': 'https://api.github.com/users/AmitMY/subscriptions', 'organizations_url': 'https://api.github.com/users/AmitMY/orgs', 'repos_url': 'https://api.github.com/users/AmitMY/repos', 'events_url': 'https://api.github.com/users/AmitMY/events{/privacy}', 'received_events_url': 'https://api.github.com/users/AmitMY/received_events', 'type': 'User', 'site_admin': False}
[{'id': 2067376369, 'node_id': 'MDU6TGFiZWwyMDY3Mzc2MzY5', 'url': 'https://api.github.com/repos/huggingface/datasets/labels/dataset%20request', 'name': 'dataset request', 'color': 'e99695', 'default': False, 'description': 'Requesting to add a new dataset'}]
[]
Good point! Yes indeed. We can probably improve that by using lazy imports #1690 added fast start-up of the library 
Hi,
I expect when importing `datasets` that nothing major happens in the background, and so the import should be insignificant.
When I load a metric, or a dataset, its fine that it takes time.

The following ranges from 3 to 9 seconds:
```
python -m timeit -n 1 -r 1 'from datasets import load_dataset'
```

edit:
sorry for the mis-tag, not sure how I added it.
{'url': 'https://api.github.com/repos/huggingface/datasets/issues/885/reactions', 'total_count': 1, '+1': 1, '-1': 0, 'laugh': 0, 'hooray': 0, 'confused': 0, 'heart': 0, 'rocket': 0, 'eyes': 0}