# Perspective Tag Indirection and View Property Changes

**URL:** <https://forum.inductiveautomation.com/t/perspective-tag-indirection-and-view-property-changes/53658>\
**Category:** Ignition\
**Tags:** ignition81, perspective\
**Created:** [December 2, 2021, 4:08am UTC](https://forum.inductiveautomation.com/t/perspective-tag-indirection-and-view-property-changes/53658 "2021-12-02T04:08:10Z")\
**Posts on this page:** 1\
**Showing post:** 7

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**Author:** ![simon.wesley](https://avatars.discourse-cdn.com/v4/letter/s/8491ac/32.png) [@simon.wesley](https://forum.inductiveautomation.com/u/simon.wesley)\
**Post date:** [December 4, 2021, 1:09pm UTC](https://forum.inductiveautomation.com/t/perspective-tag-indirection-and-view-property-changes/53658/7 "2021-12-04T13:09:03Z")

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Thanks Nick, I think I follow you.

The comment i was referring to is in this reply to this topic:

> [@Slow loading times after 8.0.14](https://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…

After re-reading the comment with fresh eyes, I believe what @pturmel was referring to was typical updates to tag values, for tag value/quality updates to a property such as a label, not reevaluating the binding.

h

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