From c13fc147080dff28644d7145a96f3020533099eb Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=C3=A9r=C3=B4me=20Benoit?= <jerome.benoit@piment-noir.org>
Date: Thu, 3 Oct 2024 18:02:54 +0200
Subject: [PATCH] refactor(reporter): simplify iters std dev computation
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Signed-off-by: Jérôme Benoit <jerome.benoit@piment-noir.org>
---
 src/reporter/json/bmf.js | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/src/reporter/json/bmf.js b/src/reporter/json/bmf.js
index b03eac7..a22616b 100644
--- a/src/reporter/json/bmf.js
+++ b/src/reporter/json/bmf.js
@@ -1,10 +1,9 @@
-import { ratioStandardDeviation } from '../../stats-utils.js'
-
 export const bmf = report => {
   return report.benchmarks
     .filter(benchmark => benchmark.error == null)
     .map(({ name, stats }) => {
-      const throughputSd = ratioStandardDeviation(1e9, 0, stats?.avg, stats?.sd)
+      // https://en.wikipedia.org/wiki/Propagation_of_uncertainty#Example_formulae
+      const throughputSd = (1e9 * stats?.sd) / stats?.avg ** 2
       return {
         [name]: {
           latency: {