[IMPROVED] Optimise needAck with new SubjectForSeq store function#6990
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neilalexander merged 1 commit intomainfrom Jun 18, 2025
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[IMPROVED] Optimise needAck with new SubjectForSeq store function#6990neilalexander merged 1 commit intomainfrom
needAck with new SubjectForSeq store function#6990neilalexander merged 1 commit intomainfrom
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Signed-off-by: Neil Twigg <neil@nats.io>
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needAck with new SubjectForSeq store functionneedAck with new SubjectForSeq store function
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Adds a new
SubjectForSeqfunction to the filestore that copies less and performs fewer allocations compared toLoadMsg. This is then used insideneedAckwhen we don't know what the subject is for the sequence, i.e. when called fromcheckStateForInterestStream.There are more improvements that need to be made here but for now this will reduce the amount of garbage created by this process, and by extension, reduce GC pressure and CPU usage on large interest-based streams.
Signed-off-by: Neil Twigg neil@nats.io