perf(diskann): async I/O overlap and dynamic beam#617
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richyreachy wants to merge 2 commits into
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Optimizes DiskANN beam search to overlap CPU computation with disk I/O, reducing query latency on disk-bound workloads. By introducing the following improvement:
Add async I/O submit/get_completed pattern to allow CPU work to proceed while disk reads still in progress.
Add dynamic beam width to ensure sufficient I/O parallelism while preventing excessive concurrent I/Os.
Fix Visit-filter deduplication to avoid redundant candidate insertions for already-visited nodes.