AddFuncDuration enables easy reporting of function duration In the following example, "execution-duration" is added to metrics and "marked" at the end of the function to record function duration defer AddFuncDuration(metrics, "execution-duration", nil).

This will report duration in microseconds to cloudwatch The duration starts when this is created and ends when converted to MetricDatum via ToAWS.

NewCloudwatchEmitter creates an emitter that publishes to AWS Cloudwatch Metrics.

NewDatadogEmitter creates an emitter that publishes custom metrics to datadog via API.

NewNoopEmitter creates an emitter that ignores metrics.

NewStderrEmitter creates an emitter dumps metrics to stderr.

MultiEmitter provides the ability to wrap multiple emitters.