diff --git a/src/editor.rs b/src/editor.rs
index ef162d5..457170b 100644
--- a/src/editor.rs
+++ b/src/editor.rs
@@ -63,6 +63,7 @@ pub struct Editor {
 	selected_blueprint: usize,
 	blueprint_scroll: usize,
 	step_time: u128,
+	max_step_time:u128,
 }
 
 #[derive(Debug, PartialEq)]
@@ -139,6 +140,7 @@ impl Editor {
 			selected_blueprint: usize::MAX,
 			blueprint_scroll: 0,
 			step_time: 0,
+			max_step_time: 0,
 		}
 	}
 
@@ -163,6 +165,7 @@ impl Editor {
 	}
 
 	fn start_sim(&mut self) {
+		self.max_step_time = 0;
 		self.machine.reset();
 		self.machine.set_board(self.source_board.clone());
 	}
@@ -355,6 +358,7 @@ impl Editor {
 				.checked_div(steps_taken)
 				.unwrap_or_default();
 			self.step_time = avg_step_time;
+			self.max_step_time = avg_step_time.max(self.max_step_time);
 		}
 		if rl.is_key_pressed(KeyboardKey::KEY_SPACE) {
 			self.step_pressed()
@@ -597,6 +601,7 @@ impl Editor {
 		draw_usize(d, textures, self.machine.step_count(), 420, 4, 9, 2);
 
 		draw_usize(d, textures, self.step_time as usize, 540, 42, 9, 1);
+		draw_usize(d, textures, self.max_step_time as usize, 540, 58, 9, 1);
 
 		d.draw_text("input:", 603, 8, 10, Color::WHITE);
 		if simple_button(d, 600, 20, 35, 15) {