The photo viewer - shotwell-is running slowly

Hi! The photo viewer - shotwell-is running slowly. Work on cutting photos almost does not work, very slow. In OS Ubuntu 16.04 worked well.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: shotwell 0.28.2-0ubuntu1
ProcVersionSignature: Ubuntu 4.15.0-43.46-generic 4.15.18
Uname: Linux 4.15.0-43-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.20.9-0ubuntu7.5
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Sun Dec 23 13:16:42 2018
InstallationDate: Installed on 2018-05-06 (231 days ago)
InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=ru_RU.UTF-8
 SHELL=/bin/bash
SourcePackage: shotwell
UpgradeStatus: No upgrade log present (probably fresh install)