As a developer, I would like Prospectus build times to be faster to improve development speed, and reduce the time needed to deploy changes to the website.
Gatsby includes a benchmarks directory (https://github.com/gatsbyjs/gatsby/tree/master/benchmarks) in its project that allows you to get estimates for speeds of various use cases. When running these benchmarks for roughly the same number of pages we create on prospectus (~13324), we see that our page queries, and especially our page builds are much slower than the benchmarks.
Gatsby create pages benchmark run:
Gatsby markdown benchmark run:
The relevant portions from a prospectus build:
Our page query speed is closer to the markdown benchmark, so that one may not be able to improved a ton, but it certainly seems like we can greatly improve our page build speed.
Another run of our page queries is absurdly slow
The page build speed (and hopefully the page query speed too) is improved to a level deemed acceptable by the team, with data collected on performance before and after the change.
https://www.gatsbyjs.org/blog/2019-01-28-building-a-large-ecommerce-website-with-gatsby-at-daniel-wellington/ has some notes on improving gatsby build times, although we likely will not want to take all the same steps they took for improving build time.
https://github.com/gatsbyjs/gatsby/issues/15628 Gatsby issue on this