When a stream had a large number of consumers on a server that were sparse, the signaling mechanism would do a linear scan to signal matching consumers. As usage patterns have continued to have more consumers that are filteres and sparse, meaning a message is destined for a single or small number of consumers.
This change moves selection to a sublist that tracks only active consumer leaders for selection, which optimizes selection of consumers to signal when the number of consumers is large.
Signed-off-by: Derek Collison <derek@nats.io>
Tests that run on Travis have been split into jobs that run in their own VM in parallel. This reduces the overall running time but also is allowing recycling of a job when we get a flapper as opposed to have to recycle the whole test suite.
JetStream Tests
For JetStream tests, we need to observe a naming convention so that no tests are omitted when running on Travis.
The script runTestsOnTravis.sh will run a given job based on the definition found in ".travis.yml".
As for the naming convention:
All JetStream tests name should start with TestJetStream
Cluster tests should go into jetstream_cluster_test.go and start with TestJetStreamCluster
Super-cluster tests should go into jetstream_super_cluster_test.go and start with TestJetStreamSuperCluster
Not following this convention means that some tests may not be executed on Travis.
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