Introduce layered_text benchmarks

benches/wgpu.rs

@@ -3,7 +3,7 @@ use criterion::{criterion_group, criterion_main, Bencher, Criterion};
 
 use iced::alignment;
 use iced::mouse;
-use iced::widget::{canvas, text};
+use iced::widget::{canvas, stack, text};
 use iced::{
     Color, Element, Font, Length, Pixels, Point, Rectangle, Size, Theme,
 };
@@ -16,6 +16,13 @@ criterion_group!(benches, wgpu_benchmark);
 pub fn wgpu_benchmark(c: &mut Criterion) {
     c.bench_function("wgpu — canvas (light)", |b| benchmark(b, scene(10)));
     c.bench_function("wgpu — canvas (heavy)", |b| benchmark(b, scene(1_000)));
+
+    c.bench_function("wgpu - layered text (light)", |b| {
+        benchmark(b, layered_text(10));
+    });
+    c.bench_function("wgpu - layered text (heavy)", |b| {
+        benchmark(b, layered_text(1_000));
+    });
 }
 
 fn benchmark(
@@ -125,15 +132,7 @@ fn benchmark(
     });
 }
 
-fn scene<'a, Message: 'a, Theme: 'a>(
+fn scene<'a, Message: 'a>(n: usize) -> Element<'a, Message, Theme, Renderer> {
-    n: usize,
-) -> Element<'a, Message, Theme, Renderer> {
-    canvas(Scene { n })
-        .width(Length::Fill)
-        .height(Length::Fill)
-        .into()
-}
-
     struct Scene {
         n: usize,
     }
@@ -174,3 +173,18 @@ impl<Message, Theme> canvas::Program<Message, Theme, Renderer> for Scene {
             })]
         }
     }
+
+    canvas(Scene { n })
+        .width(Length::Fill)
+        .height(Length::Fill)
+        .into()
+}
+
+fn layered_text<'a, Message: 'a>(
+    n: usize,
+) -> Element<'a, Message, Theme, Renderer> {
+    stack((0..n).map(|i| text(format!("I am paragraph {i}!")).into()))
+        .width(Length::Fill)
+        .height(Length::Fill)
+        .into()
+}