INNER CODE UNIT · Go

sigma

bhope/hedge · benchmark/streaming/main.go:88

	sigma := math.Sqrt(math.Log(1 + cv2))
	mu := math.Log(meanNs) - sigma*sigma/2
	return mu, sigma
}

// sampleTTFT draws a first-token latency from the configured distribution.
func sampleTTFT() time.Duration {
	if rand.Float64() < cacheMissRate {
		return time.Duration(math.Exp(missMu + missSigma*rand.NormFloat64()))
	}
	return time.Duration(math.Exp(hitMu + hitSigma*rand.NormFloat64()))
}

// ── test servers ────────────────────────────────────────────────────────────

// newStreamingServer flushes 200 OK headers immediately then writes the first
// body byte only after the TTFT delay. This separates header arrival from
// first-token time and makes TTFB measurement produce near-zero observations.

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