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(parent: 9fab25c) | patch
Optimize TransactionIdIsCurrentTransactionId().
authorThomas Munro <tmunro@postgresql.org>
Mon, 11 Nov 2019 03:33:04 +0000 (16:33 +1300)
committerThomas Munro <tmunro@postgresql.org>
Mon, 11 Nov 2019 03:33:04 +0000 (16:33 +1300)
commit695c5977c8bc115029a85dcc1821d7b0136b4e4c
tree61b9edb5b40e3eb4afeec44a34d7a630894ca091tree
parent9fab25c6cd1f943284b8e0014007cd5750d54308commit | diff
Optimize TransactionIdIsCurrentTransactionId().

If the passed in xid is the current top transaction, we can do a fast
check and exit early.  This should work well for the current heap but
also works very well for proposed AMs that don't use a separate xid
for subtransactions.

Author: Ashwin Agrawal, based on a suggestion from Andres Freund
Reviewed-by: Thomas Munro
Discussion: https://postgr.es/m/CALfoeiv0k3hkEb3Oqk%3DziWqtyk2Jys1UOK5hwRBNeANT_yX%2Bng%40mail.gmail.com
src/backend/access/transam/xact.c diff | blob | blame | history
Andres' PG stuff