Clarification on StateHasChanged Behavior with Razor Syntax

[Mike-E-angelo]

I was reading this documentation:

https://www.fluentui-blazor.net/Icon

In it, it provides the following Razor markup:

<FluentIcon Value="@(new Icons.Regular.Size24.Bookmark())" />

My understanding is that whenever StateHasChanged is called, any instructions within @() get re-evaluated. If I understand correctly, each time StateHasChanged is called, it will result in another allocation to memory, ultimately adding to GC pressure for the process.

Is my understanding correct? I have been wary of performing any activations in Razor markup due to this and would like to know if I am incorrect. Rather, I have been assigning allocations used in markup in the OnInitialized override where it seems this is called only once during the components lifetime (and therefore only one allocation).

Thank you for any insight/clarification you can provide.

[Mike-E-angelo]

This does appear to be a thing:

aspnetcore/src/Components/Web/src/Forms/EditForm.cs

Line 15 in f22b350

private readonly Func<Task> _handleSubmitDelegate; // Cache to avoid per-render allocations