Struct ProbeResult 

pub struct ProbeResult {
    pub avg_latency: Duration,
    pub samples: u32,
}

Result of a pre-flight latency probe.

Fields

avg_latency: Duration

Observed average request latency.

samples: u32

Number of successful probe requests.

Implementations

impl ProbeResult

pub fn required_vus(&self, target_rps: u32, num_operations: u32) -> u32

Required VUs to sustain target_rps end-to-end with num_operations per iteration.

Why num_operations matters: k6’s constant-arrival-rate executor (set by --rps) targets ITERATIONS per second, not requests. Each iteration runs every operation in the generated script sequentially. So sustaining --rps R with a spec of N operations actually needs R × N × latency_secs VUs, not R × latency_secs.

Issue #79 round 9 — Srikanth saw “Pre-flight probe: –vus 5 is sufficient” followed by k6 emitting “Insufficient VUs” mid-run. Cause: he had a ~12-operation spec, so the real iteration time was ~12 × measured latency, not 1 ×.

Formula: rps × num_operations × latency_secs + 1 (safety margin). Returns at least 1.

Trait Implementations

impl Clone for ProbeResult

fn clone(&self) -> ProbeResult

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ProbeResult

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Copy for ProbeResult