Optimize memory usage in some scenarios

processing/processing.go

@@ -35,7 +35,7 @@ var mainPipeline = pipeline{
 	flatten,
 	watermark,
 	exportColorProfile,
-	finalize,
+	stripMetadata,
 }
 
 func isImageTypePreferred(imgtype imagetype.Type) bool {
@@ -182,10 +182,6 @@ func transformAnimated(ctx context.Context, img *vips.Image, po *options.Process
 		return err
 	}
 
-	if err = img.CopyMemory(); err != nil {
-		return err
-	}
-
 	if len(delay) == 0 {
 		delay = make([]int, framesCount)
 		for i := range delay {