diff --git a/src/libcamera/software_isp/debayer_egl.cpp b/src/libcamera/software_isp/debayer_egl.cpp
index 9ec966608..534e36050 100644
--- a/src/libcamera/software_isp/debayer_egl.cpp
+++ b/src/libcamera/software_isp/debayer_egl.cpp
@@ -393,8 +393,11 @@ int DebayerEGL::configure(const StreamConfiguration &inputCfg,
 	window_.width = outputCfg.size.width;
 	window_.height = outputCfg.size.height;
 
-	/* Don't pass x,y since process() already adjusts src before passing it */
-	stats_->setWindow(Rectangle(window_.size()));
+	/*
+	 * Don't pass x,y since process() already adjusts src before passing it.
+	 * But reduce the width and height by 2/3 for speedup.
+	 */
+	stats_->setWindow(Rectangle(window_.size()).croppedBy(2, 3));
 
 	LOG(Debayer, Debug) << "Input width " << inputCfg.size.width << " height " << inputCfg.size.height;
 	LOG(Debayer, Debug) << "Output width " << outputCfg.size.width << " height " << outputCfg.size.height;