Reduce allocations in consumers

nats-io / nats-server

High-Performance server for NATS.io, the cloud and edge native messaging system.

https://nats.io

Apache License 2.0

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Closed neilalexander closed 4 weeks ago

neilalexander commented 4 weeks ago

This PR makes the following changes that should reduce allocations in consumers:

JSApiConsumerGetNextRequest structs are now pooled, as they were unavoidably escaping to the heap;
waitingRequest structs are now returned to the pool correctly if hitting MaxWaiting;
Reuse the hdr buffer from pooled jsPubMsg when returning consumer errors to the client.

Signed-off-by: Neil Twigg neil@nats.io