Fix a performance issue with multiple logical-decoding walsenders

When Who What
2020-01-06 21:43:48 Tom Lane (tgl) Closed in commitfest 2020-01 with status: Committed
2020-01-06 21:33:56 Tom Lane (tgl) Added tgl as committer
2020-01-06 18:00:40 Tom Lane (tgl) Removed tgl from committers
2020-01-06 17:48:23 Tom Lane (tgl) Added tgl as committer
2019-12-30 08:23:53 Julien Rouhaud (rjuju) New status: Ready for Committer
2019-12-30 08:22:46 Pierre Ducroquet (pinaraf) Changed targetversion to 13
2019-12-30 08:22:46 Pierre Ducroquet (pinaraf) Changed reviewers to Julien Rouhaud (rjuju)
2019-12-30 08:22:46 Pierre Ducroquet (pinaraf) Changed authors to Pierre Ducroquet (pinaraf)
2019-12-30 08:22:12 Pierre Ducroquet (pinaraf) Attached mail thread 2931018.Vxl9zapr77@pierred-pdoc
2019-12-30 08:22:12 Pierre Ducroquet (pinaraf) Created patch record