Never

Samplers.neverSample();

from opencensus.trace.samplers import always_off
from opencensus.trace import tracer as tracer_module

sampler = always_off.AlwaysOffSampler()
tracer = tracer_module.Tracer(sampler=sampler)

// Samplers are potentially expensive to construct. Use one long-lived
// sampler instead of constructing one for every Span.
static opencensus::trace::NeverSampler sampler;

const root = new RootSpan(tracer);
const sampler = SamplerBuilder.getSampler(0); // Never samples when value is <= 0
const samplerShouldNotSample = sampler.shouldSample(root.traceId);