diff --git a/driver/driver.go b/driver/driver.go
index 74e96f0..6abb6be 100644
--- a/driver/driver.go
+++ b/driver/driver.go
@@ -329,8 +329,10 @@
 func (p latencyData) Swap(i, j int)      { p[i], p[j] = p[j], p[i] }
 
 func latencyInit(N uint64) {
-	N = min(N, 1e6) // bound the amount of memory consumed
-	latency.data = make(latencyData, N)
+	// Use fixed size slice to:
+	// - bound the amount of memory consumed
+	// - eliminate variance in runs that use different number of iterations
+	latency.data = make(latencyData, 1e6)
 	latency.idx = 0
 }