iris: separate layout allocation from lengths

benches/message_list.rs

@@ -140,7 +140,7 @@ fn bench_input_grows(n: usize, lines: usize) {
     let input_area = rsc.ui.widgets.add_strong(Sized {
         inner: input_rect.any(),
         x: None,
-        y: Some(abs(line_height)),
+        y: Some(abs(line_height).into()),
     });
 
     let input_area_weak = input_area.weak();
@@ -162,7 +162,7 @@ fn bench_input_grows(n: usize, lines: usize) {
     let mut total_moves = 0u64;
     for line in 1..=lines {
         rsc.ui.widgets.get_mut(&input_area_weak).unwrap().y =
-            Some(abs(line_height * (line + 1) as f32));
+            Some(abs(line_height * (line + 1) as f32).into());
         let start = Instant::now();
         render.update(&root, &mut rsc);
         total += start.elapsed();
@@ -253,7 +253,7 @@ fn bench_expand_holds_edge(n: usize, growths: usize) {
             let sized = rsc.ui.widgets.add_strong(Sized {
                 inner: rect.any(),
                 x: None,
-                y: Some(abs(40.0)),
+                y: Some(abs(40.0).into()),
             });
             growable = Some(sized.weak());
             list.push_back(LazyItem::new(i as u64, sized.any()));
@@ -287,7 +287,7 @@ fn bench_expand_holds_edge(n: usize, growths: usize) {
                 .unwrap()
                 .note_tap(top + 1.0);
         }
-        rsc.ui.widgets.get_mut(&growable).unwrap().y = Some(abs(height));
+        rsc.ui.widgets.get_mut(&growable).unwrap().y = Some(abs(height).into());
         let start = Instant::now();
         render.update(&root, &mut rsc);
         total += start.elapsed();