# Perspective: Binding efficiency between using Expression and Indirect Tag + Expression tranform **URL:** \ **Category:** Ignition\ **Tags:** perspective, ignition80\ **Created:** [September 21, 2020, 1:16am UTC](https://forum.inductiveautomation.com/t/perspective-binding-efficiency-between-using-expression-and-indirect-tag-expression-tranform/38881 "2020-09-21T01:16:22Z")\ **Posts on this page:** 1\ **Showing post:** 4
**Author:** ![pturmel](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/pturmel/32/3295_2.png) [@pturmel](https://forum.inductiveautomation.com/u/pturmel)\ **Post date:** [September 21, 2020, 2:57pm UTC](https://forum.inductiveautomation.com/t/perspective-binding-efficiency-between-using-expression-and-indirect-tag-expression-tranform/38881/4 "2020-09-21T14:57:18Z")
My answer is a little more nuanced in Perspective if using structure bindings: > [@Slow loading times after 8.0.14](http://forum.inductiveautomation.com/t/slow-loading-times-after-8-0-14/37413/5): > > Yes. Consider that tag values update repeatedly and asynchronously, while tag paths are typically evaluated only when a Perspective view/page opens. The reduction in work in an Expression Structure that only has to evaluate tag values (from custom props) as opposed to also evaluating tag paths (that are now only part of the custom props) is a win even though there are more bindings overall. Also consider that while an Expression Structure may be needed to deliver consistent data+config to a c… Otherwise, yes, use indirect bindings. --- _[View the full topic](https://forum.inductiveautomation.com/t/perspective-binding-efficiency-between-using-expression-and-indirect-tag-expression-tranform/38881)._