Better persistent storage

[CAFxX]

A better backend for the GM_*Value could be a good idea.
In a couple of scripts I need to work on big persistent arrays and performance is sluggish, even using memoization.

[johan]

Have you considered and written off HTML5 storage as a non-viable option (i e because your script has to execute across domains)? If not, you can't get much better portability and future safety support than using the browser-native tools.

[arantius]

See: http://groups.google.com/group/greasemonkey-dev/t/8b82b4e5919b96dc

Patch from 2006 probably doesn't work anymore.

[DavidJCobb]

A private DOM Storage object, like those provided to Opera userscripts, would be a good idea -- especially if StorageEvents are implemented reliably. It'd allow for large data stores and easier synchronization between multi-tab userscripts, without leaking into or potentially interfering with storage code in the content scope.

[jerone]

This is fixed by #1798, using SQLite now.