Hi everyone, I just finished off a PR I started quite a while ago to make some substantial improvements to the HaloCatalog in the yt_astro_analysis package. The major updates are: - support for halo finding on a time-series for all halo finders (fof, hop, and rockstar). You no longer have to run the RockstarHaloFinder separately or call HaloCatalog in a loop for hop/fof. - the loop over all halos in HaloCatalog now happens one io chunk at a time, instead of just querying ds.all_data(). This happens only on the root process now, significantly reducing io and time to being iterating. - vastly updated halo finding documentation. If anyone would like to offer comments on this, please find the pull request at the link below: https://github.com/yt-project/yt_astro_analysis/pull/62 Thanks! Britton