Make the $ operator in GDScript cache node references (or add a $$ operator)

EDIT: ~~If #1048 is implemented, it may make this proposal obsolete.~~ EDIT 2: As @h0lley noted, #1048 doesn't actually make this proposal obsolete. It provides a clean alternative but it still results in boilerplate and a lack of green syntax highlighting unlike this proposal. **Describe the project you are working on:** https://github.com/godotengine/godot-demo-projects/ but this applies to any project made in GDScript. **Describe the problem or limitation you are having in your project:** Here is a code snippet from Dodge the Creeps:  The problem is that this code looks elegant, but it isn't very performant. Every time this method is called, it has to call `get_node()` 6 times, and 2 of those times are getting the same node (HUD). We can reduce this from 6 to 5 by caching the HUD reference like this:  However, this method is still very inefficient, since it calls `get_node()` 5 times every time the method is ran. The best simple option that I can see is to use `onready var` like this:  This means that `get_node()` is only called 5 times once when this node is created,

Posted by aaronfranke on Jun 2, 2020, 7:35 PM

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