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Add paragraph about typed-arena to README

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Tyler Hallada 2020-04-26 01:49:48 -04:00
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@ -20,6 +20,15 @@ Rust under the hood. The browser-grade
[rust-cssparser](https://github.com/servo/rust-cssparser) are used to parse HTML
and CSS respectively.
This project expands on [an example in the html5ever
repo](https://github.com/servo/html5ever/blob/7efca84c788bf9c9b4f314482b9630130812f994/html5ever/examples/arena.rs)
which parses the HTML tree into a cyclic node structure allocated in an arena
using the [typed-arena](https://github.com/SimonSapin/rust-typed-arena) crate.
Allocating into the arena is not only very fast, but gets around tricky
borrow-checking issues in Rust to enable bi-directional tree structures that
provide the most flexibility in traversing the tree (being able to look up the
parents *and* the children of any given node).
## Why chela?
At the time of writing, [ammonia](https://github.com/rust-ammonia/ammonia) is