Laggy moving cursor in large files when autosave is enabled

[rmtsrc]

This could be related to #13.

Steps to reproduce:

1. Open System Preferences, click Keyboard and set Key Repeat to the highest setting (Fast)
2. Enable the default atom/autosave package
3. Open an existing large JavaScript file e.g. over 100 lines (say backbone.js)
4. Press & hold the down arrow and notice how laggy the cursor moves between lines (same with up arrow). CPU usage also spikes with the Atom Helper process jumping to around 99% usage, while the down arrow is being pressed.

Note when autosave is disabled cursor moves with less lag.

[saschagehlich]

Thanks for the report. Just released 0.7.0 which fixes this.

[rmtsrc]

Thanks for the super quick fixes on those issues! 👍