From dc9c37908d2af217d646b1dff460041650b95a31 Mon Sep 17 00:00:00 2001
From: TudbuT <forge-public@mail.tudbut.de>
Date: Mon, 9 Feb 2026 18:18:14 +0100
Subject: [PATCH] speed test

---
 src/lib.rs | 45 ++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 44 insertions(+), 1 deletion(-)

diff --git a/src/lib.rs b/src/lib.rs
index 3e7420e..45b5d2a 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -97,7 +97,7 @@ pub trait ImgSyn: Clone {
 
 #[cfg(test)]
 mod test {
-    use std::fs;
+    use std::{fs, hint::black_box};
 
     use crate::{Canvas, ImgSyn, PixFnFloat, Pixel, polar_math::distance_from_circle};
 
@@ -183,4 +183,47 @@ mod test {
         )
         .unwrap();
     }
+
+    #[test]
+    fn speed() {
+        let canvas = Canvas::new(10000., 10000., Pixel::new_white());
+        black_box(
+            canvas
+                .add_image(
+                    0.07,
+                    0.03,
+                    0.9,
+                    0.9,
+                    Canvas::new(9000., 9000., Pixel::new_black()).map_area(
+                        |x, y, _| distance_from_circle(x, y, 1.0, 0.0, 0.5, 1.0, 1.0) > 0.0,
+                        |x, y, px: Pixel| px.with_r(x).with_g(1. - y),
+                    ),
+                )
+                .map_area(
+                    |x, y, _| {
+                        let xc = 0.07;
+                        let yc = 0.93;
+                        let t = 0.003;
+                        (xc - t..=xc + t).contains(&x) && y >= 0.03
+                            || (yc - t..=yc + t).contains(&y) && x <= 0.97
+                    },
+                    |x, y, px: Pixel| {
+                        if (1. + x - y) % 0.03 <= 0.02 {
+                            px.with_rgb(1.0, 0.0, 0.5)
+                        } else {
+                            px.with_rgb(1.0, 1.0, 0.0)
+                        }
+                    },
+                )
+                .mapped_rect(0.02, 0.93, 0.05, 0.05, |img| {
+                    img.map_area(
+                        |x: f64, y: f64, _| {
+                            distance_from_circle(x, y, 0.6, 0.5, 0.2, 1.0, 1.4).abs() < 0.03
+                        },
+                        |_, _, px: Pixel| px.with_rgb_of(0.0),
+                    )
+                })
+                .paint(canvas),
+        );
+    }
 }