OpenTelemetry API v0.3.1 OpenTelemetry.Meter
require OpenTelemetry.Meter
OpenTelemetry.register_application_meter(Your.Application)
OpenTelemetry.Meter.new_instruments([...])
bound = OpenTelemetry.Meter.bind("some.latency", [])
# measure time spent on some function and then record it
OpenTelemetry.Meter.record(bound, time)