[nomaster] Revert "SI-5017 Poor performance of :+ operator on Arrays"

This reverts commit 02b2da63409af6a28824cbb74d00d0ec04518c8d.
Merge pull request #2080 from JamesIry/2.10.x_SI-5017

[nomaster] Revert "SI-5017 Poor performance of :+ operator on Arrays"