What's Changed

• chore: bump docs and build for v5.3.0 by @coolsoftwaretyler in https://github.com/mobxjs/mobx-state-tree/pull/2108
• perf: make model creation faster by @coolsoftwaretyler in https://github.com/mobxjs/mobx-state-tree/pull/2113

Full Changelog: https://github.com/mobxjs/mobx-state-tree/compare/v5.3.0...v5.3.1-alpha.1

We cut this release with a small change set because we wanted to get real-world testing on the changes in https://github.com/mobxjs/mobx-state-tree/pull/2113. If you want to help MST get faster out of the box, please try v5.3.1-alpha.1 and report any improvements in speed, regression in speed, or regressions in functionality you experience.