jimczi commented on PR #14178:
URL: https://github.com/apache/lucene/pull/14178#issuecomment-2622455427
> Almost 10x indexing throughput improvement tells me we are doing something
silly in Lucene.
I did not test this specific integration but Faiss is multithreaded on bulk
training, adding and searching so we have to be careful when comparing the
result.
The benchmark results show a single segment but only Faiss reports time
spent in the force merge.
Does that mean that you indexed with `-numIndexThreads=1` for the Lucene
run? Since Faiss uses multithreading by default, we cannot compare with Lucene
if we don't use multi thread indexing and merging.
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