When running jekyll --server, the entire site is rebuilt. On a large enough site, this takes an exceedingly long time. Even with the --auto flag, which should prevent whole-site regeneration, the time to completion is rather lengthy (10+ seconds for me, reportedly in the minutes for some). This is inconvenient when editing and previewing a single page. I'm looking to cut that time down.
Is there a means of determining why Jekyll takes as long as it does to rebuild a page?
Alternatively, are there recommendations for editing workflow which allow for a short(er) feedback loop with Jekyll?