@ -576,7 +576,7 @@ class PromptServer():
bytesIO = BytesIO()
header = struct.pack(">I", type_num)
bytesIO.write(header)
image.save(bytesIO, format=image_type, quality=95, compress_level=4)
image.save(bytesIO, format=image_type, quality=95, compress_level=1)
preview_bytes = bytesIO.getvalue()
await self.send_bytes(BinaryEventTypes.PREVIEW_IMAGE, preview_bytes, sid=sid)