Create these NSDecimal values using NSDecimalNumber, not NSNumber.
Create these NSDecimal values using NSDecimalNumber, not NSNumber.

This is much faster, as Shark revealed that NSNumber creates an NSDecimal using -descriptionWithLocale: and NSScanner, and NSDecimalNumber apparently does not.

aufflick/core-plot,aufflick/core-plot,aufflick/core-plot,aufflick/core-plot,aufflick/core-plot