Query for root text entity components directly.
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C-Performance
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- Dominant language
- Rust
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Description
## What problem does this solve or what need does it fill?
In the text systems `update_text2d_layout`, `measure_text`, and `update_text_layout` we query for the root text entities layout components, `ComputedTextBlock`, `TextLayout`, `TextLayoutInfo` etc, but collect their text section data seperately using the `TextReader` API.
## What solution would you like?
It should be much more efficient to include the text section components in the root text entity query, and then only use `TextReader` to access `TextSpan`s.
It's not stictly block by #19437 but I'd prefer to get #23166 merged first before this is done.
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