• Add support for upcoming dead letter topics feature
  • Expose Subscription.ReceiveSettings.MaxExtensionPeriod setting
  • Standardize default settings with other client libraries
    • Increase publish delay threshold from 1ms to 10ms
    • Increase subscription MaxExtension from 10m to 60m
  • Always send keepalive/heartbeat ping on StreamingPull streams to minimize stream reopen requests


  • Limit default grpc connections to 4.
  • Fix issues with OpenCensus metric for pull count not including synchronous pull messages.
  • Fix issue with publish bundle size calculations.
  • Add ClearMessages method to pstest server.


Small fix to a package name.


This is the first tag to carve out pubsub as its own module. See: