On the surface, Android 6.0.1 Marshmallow looked like an aesthetic fix that brought nothing but dozens of new emojis to our devices. However, the more we use it, the more we discover small fixes that have been applied to improve the overall experience, like the jumping behavior of the Share menu, the failed MMS bug, and more. Another change you might notice is that the lag when waiting for the floating toolbar to pop up has gone.
Android 6.0.1 Fixed The Lag In The Copy/Share Floating Toolbar Popup was written by the awesome team at Android Police.
Source: Andriod Police