vendor

egui/crates/epaint/benches/benchmark.rs

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+use criterion::{black_box, criterion_group, criterion_main, Criterion};
+
+use epaint::*;
+
+fn single_dashed_lines(c: &mut Criterion) {
+    c.bench_function("single_dashed_lines", move |b| {
+        b.iter(|| {
+            let mut v = Vec::new();
+
+            let line = [pos2(0.0, 0.0), pos2(50.0, 0.0), pos2(100.0, 1.0)];
+
+            for _ in 0..100 {
+                v.extend(Shape::dashed_line(
+                    &line,
+                    Stroke::new(1.5, Color32::RED),
+                    10.0,
+                    2.5,
+                ));
+            }
+
+            black_box(v);
+        });
+    });
+}
+
+fn many_dashed_lines(c: &mut Criterion) {
+    c.bench_function("many_dashed_lines", move |b| {
+        b.iter(|| {
+            let mut v = Vec::new();
+
+            let line = [pos2(0.0, 0.0), pos2(50.0, 0.0), pos2(100.0, 1.0)];
+
+            for _ in 0..100 {
+                Shape::dashed_line_many(&line, Stroke::new(1.5, Color32::RED), 10.0, 2.5, &mut v);
+            }
+
+            black_box(v);
+        });
+    });
+}
+
+fn tessellate_circles(c: &mut Criterion) {
+    c.bench_function("tessellate_circles_100k", move |b| {
+        let radii: [f32; 10] = [1.0, 2.0, 3.6, 4.0, 5.7, 8.0, 10.0, 13.0, 15.0, 17.0];
+        let mut clipped_shapes = vec![];
+        for r in radii {
+            for _ in 0..10_000 {
+                let clip_rect = Rect::from_min_size(Pos2::ZERO, Vec2::splat(1024.0));
+                let shape = Shape::circle_filled(Pos2::new(10.0, 10.0), r, Color32::WHITE);
+                clipped_shapes.push(ClippedShape(clip_rect, shape));
+            }
+        }
+        assert_eq!(clipped_shapes.len(), 100_000);
+
+        let pixels_per_point = 2.0;
+        let options = TessellationOptions::default();
+
+        let atlas = TextureAtlas::new([4096, 256]);
+        let font_tex_size = atlas.size();
+        let prepared_discs = atlas.prepared_discs();
+
+        b.iter(|| {
+            let clipped_primitive = tessellate_shapes(
+                pixels_per_point,
+                options,
+                font_tex_size,
+                prepared_discs.clone(),
+                clipped_shapes.clone(),
+            );
+            black_box(clipped_primitive);
+        });
+    });
+}
+
+criterion_group!(
+    benches,
+    single_dashed_lines,
+    many_dashed_lines,
+    tessellate_circles
+);
+criterion_main!(benches);