diff --git a/libvips/iofuncs/region.c b/libvips/iofuncs/region.c
index 715da41a..835026a9 100644
--- a/libvips/iofuncs/region.c
+++ b/libvips/iofuncs/region.c
@@ -1111,12 +1111,23 @@ vips_region_copy( VipsRegion *reg, VipsRegion *dest, VipsRect *r, int x, int y )
 		VIPS_IMAGE_SIZEOF_PEL( dest->im ) );
 #endif /*DEBUG*/
 
-	for( z = 0; z < r->height; z++ ) {
-		memcpy( q, p, len );
+	/* Copy the scanlines. 
+	 *
+	 * Special case: if the two sets of scanlines are end-to-end (this
+	 * happens if we are copying complete regions) we can do a single
+	 * memcpy() for the whole thing. This is a little faster since we 
+	 * won't have to do unaligned copies.
+	 */
+	if( len == plsk &&
+		len == qlsk ) 
+		memcpy( q, p, len * r->height );
+	else
+		for( z = 0; z < r->height; z++ ) {
+			memcpy( q, p, len );
 
-		p += plsk;
-		q += qlsk;
-	}
+			p += plsk;
+			q += qlsk;
+		}
 }
 
 /* Generate area @target in @to using pixels in @from. 
diff --git a/libvips/resample/templates.h b/libvips/resample/templates.h
index 398c3a2c..07f03ab9 100644
--- a/libvips/resample/templates.h
+++ b/libvips/resample/templates.h
@@ -438,8 +438,10 @@ reduce_sum( const T * restrict in, int stride, const IT * restrict c, int n )
 	IT sum;
 
 	sum = 0; 
-	for( int i = 0; i < n; i++ )
-		sum += c[i] * in[i * stride];
+	for( int i = 0; i < n; i++ ) {
+		sum += c[i] * in[0];
+		in += stride;
+	}
 
 	return( sum ); 
 }