Will It Build is a new public benchmarking service launched by Gatsby Cloud that allows users to view and compare build times for websites and applications built with Gatsby. The service demonstrates the progress of build times for various sample Gatsby sites, using popular CMSs like WordPress, Contentful, Drupal, and DatoCMS, and supports MDX and Markdown as data sources. It features an open-source benchmark plugin and example sites, with data accessible via a GraphQL API. The service highlights the significant reduction in build times facilitated by Gatsby Cloud's Incremental Builds feature, categorizing builds into three types: uncached/code changes, cached code changes, and data changes from a CMS. These builds vary in speed, with the fastest being the incremental builds available exclusively on Gatsby Cloud. The initiative underscores Gatsby's commitment to optimizing build performance and providing transparency in site development metrics.