**Description** We are add 8000+ annotation on mapview at that time app stuck and memory used 160+ MB. **Screenshots** If applicable, add screenshots to help explain your problem. **Smartphone** - Device: [e.g. iPhone7] - OS: [e.g. iOS13.3] **Checklist** - [ ] I updated Cluster to the latest version. - [ ] I read the [Contribution Guidelines](https://github.com/efremidze/Cluster/blob/master/.github/CONTRIBUTING.md). - [ ] I read the [documentation](https://github.com/efremidze/Cluster). - [ ] I searched for [existing GitHub issues](https://github.com/efremidze/Cluster/issues).