CPU usage hovering over bag items

[boomboo]

Addon Version

v0.1.96

World of Warcraft Version

Retail

Describe the bug

Addon's CPU usage increases while hovering on/off over items in the bags. Seems to be caused by hooking item buttons to OnEnter in these two locations: https://github.com/Cidan/BetterBags/blob/3e481ab17754e17119aa92a297d6b526dbf3191b/frames/item.lua#L607 https://github.com/Cidan/BetterBags/blob/3e481ab17754e17119aa92a297d6b526dbf3191b/frames/item.lua#L585

I couldn't see any noticeable effect fps wise apart from being reported by various addon CPU profilers.

Steps to reproduce

Mouse over an item on and off.