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Summary
Speed up the README dupes query by checking payee usage directly from the base transaction tables instead of joining through the flattened transaction views.
Why
The old query forced SQLite to materialize
flat_transactionsandscheduled_flat_transactions, including category joins, just to answer whether a payee had ever been referenced. On the local database this changed the runtime from about 2.8s to about 0.01s.Impact
The documented query stays functionally the same, but it is much cheaper to run on larger exports.