Optimize ACS pipeline for runtime and memory #5832
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Lift some queries that were performed per-batch outside of the loop, resolving an N+1 where N=number of batches. Also use .iterator() [noissue]
Instead of performing a gigantic AND-ed OR clause query, break up the list of remote artifacts by checksum type and perform one IN query per type of checksum, which ought to be easily indexable. [noissue]
Lift the ACS domain check out of the stage entirely. [noissue]
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So far, I can tell that it at least reduced runtimes by about 75%, but the memory use improvement is minimal.