v1.1.1 - More Perf updates

This Point release is mainly about a little bit more of performance updates.

we've tried to reduce the amount of copying new node instances thanks to the linked-list work we've added in the previous version.
Rather than returning new instances or performing the update-copy procedure where it was redundant this time we've tried to work with the existing node.

Full Changelog: v1.1.0...v1.1.1