This commit adds subtree memoization to Dioxus.
Subtree memoization is basically a compile-time step that drastically
reduces the amount of work the diffing engine needs to do at runtime by
extracting non-changing nodes out into a static "template." Templates
are then understood by the various renderers in the ecosystem as a
faster way of rendering the same items.
For example, in the web, templates are simply a set of DOM Nodes created
once and then cloned later. This is the same pattern frameworks like Lithtml
and SolidJS use to achieve near-perfect performance.
Subtree memoization adds an additional level of complexity to Dioxus. The RSX
macro needs to be much smarter to identify changing/nonchanging nodes and
generate a mapping between the Template and its runtime counterparts.
This commit represents a working starter point for this work, adding support
for templates for the web, desktop, liveview, ssr, and native-core renderers.
In the future we will try to shrink code generation, generally improve
performance, and simplify our implementation.
This commit adds lifetimes to the diff and realdom methods so consumers may borrow the contents of the DOM for serialization or asynchronous modifications.
saicu