Is extension needed at startup?

It takes some time to load:

![Screenshot (290)](https://user-images.githubusercontent.com/9638156/87047871-b70d1600-c203-11ea-9809-51becd1b43d7.png)

Would it make a difference if you use the new activation event [onStartupFinished](https://code.visualstudio.com/api/references/activation-events#onStartupFinished) ?