# Objective
Currently text is recomputed unnecessarily on any changes to its color,
which is extremely expensive.
## Solution
Split up `TextStyle` into two separate components `TextFont` and
`TextColor`.
## Testing
I added this system to `many_buttons`:
```rust
fn set_text_colors_changed(mut colors: Query<&mut TextColor>) {
    for mut text_color in colors.iter_mut() {
        text_color.set_changed();
    }
}
```
reports ~4fps on main, ~50fps with this PR.
## Migration Guide
`TextStyle` has been renamed to `TextFont` and its `color` field has
been moved to a separate component named `TextColor` which newtypes
`Color`.
		
	
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|---|---|---|
| .. | ||
| android_basic | ||
| android_example | ||
| android_example_native | ||
| bevy_mobile_example.xcodeproj | ||
| ios-src | ||
| src | ||
| .gitignore | ||
| build_rust_deps.sh | ||
| Cargo.toml | ||
| Makefile | ||