ExtractNodes: read ORC files in parallel
Spawn many sort(1) in parallel to avoid locking, then a sort -m to merge all the batches
Benchmarks on popular-3k-python:
Before: 51:52.18 total After: 5:53.77 total
Migrated from D7733 (view on Phabricator)
Spawn many sort(1) in parallel to avoid locking, then a sort -m to merge all the batches
Benchmarks on popular-3k-python:
Before: 51:52.18 total After: 5:53.77 total
Migrated from D7733 (view on Phabricator)