I have routinely left known performance optimization tasks to be done after the initial review of a product's MVP features. It just seemed better to get the fir

I have routinely left known performance optimization tasks to be done after the initial review of a product's MVP features. It just seemed better to get the first cut out to people to review in case significant refactoring occurred in response to the first round of feedback. The unintended consequence of this approach is that changes in response to feedback appeared to have much more impact on the overall UX experience. It increased reviewers' feeling of ownership of the product and they were more likely to become product champions and evangelists.