Reduce unnecessary chunking

Author: bugadani

CHANGELOG.md

@@ -13,6 +13,9 @@ SSD1306 monochrome OLED display.
 - Implement `embedded_graphics::draw_target::DrawTarget::fill_contiguous` to more improve performance when filling
   contiguous regions.
 
+### Changed
+- Improved interface utilisation when the buffer to be sent is contiguous.
+
 ## [0.10.0] - 2025-03-22
 ### Changed
 - Added `DisplaySize64x32` to the prelude

src/lib.rs

@@ -502,15 +502,25 @@ where
         let page_lower = upper_left.0 as usize;
         let page_upper = lower_right.0 as usize;
 
-        for c in buffer
-            .chunks(disp_width)
-            .skip(starting_page)
-            .take(num_pages)
-            .map(|s| &s[page_lower..page_upper])
-        {
-            interface.send_data(U8(c)).await?
+        let is_contiguous = page_lower == 0 && page_upper == SIZE::WIDTH as usize;
+
+        if is_contiguous {
+            interface
+                .send_data(U8(
+                    &buffer[starting_page * disp_width..][..num_pages * disp_width]
+                ))
+                .await
+        } else {
+            for c in buffer
+                .chunks(disp_width)
+                .skip(starting_page)
+                .take(num_pages)
+                .map(|s| &s[page_lower..page_upper])
+            {
+                interface.send_data(U8(c)).await?;
+            }
+            Ok(())
         }
-        Ok(())
     }
 
     /// Release the contained interface.