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HATS query parallelization methods #110

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@troyraen troyraen commented Jun 19, 2025

This PR is not intended to be merged. The included notebook is for demonstration and discussion purposes.

Notebook explores how to efficiently execute a non-spatial query on the Euclid HATS Q1 catalog (in prep released). Results so far:

Method Num Workers Time Max Total Memory Used
Pyarrow 1 1 – 1.5 min 2 GB
Pyarrow + Dask 4, 8, 16 40 sec – 1 min 4 GB
LSDB 4 21 min 5.5 GB
  8 8 – 9 min 5 GB
  16 4.5 – 5.5 min 8 GB

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