From a28b83cc1a2efcb05e2a31b9d91103e4d1174387 Mon Sep 17 00:00:00 2001
From: piersoh <42040737+piersoh@users.noreply.github.com>
Date: Thu, 4 Jun 2020 07:48:57 +0100
Subject: [PATCH] Reversed order of samplesize test to match usage by
 getAverageSlidingWindow() (#3276)

---
 src/streaming/rules/ThroughputHistory.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/streaming/rules/ThroughputHistory.js b/src/streaming/rules/ThroughputHistory.js
index d9c0a8f04c..8dcc391284 100644
--- a/src/streaming/rules/ThroughputHistory.js
+++ b/src/streaming/rules/ThroughputHistory.js
@@ -159,7 +159,7 @@ function ThroughputHistory(config) {
         } else if (isThroughput) {
             // if throughput samples vary a lot, average over a wider sample
             for (let i = 1; i < sampleSize; ++i) {
-                const ratio = arr[i] / arr[i - 1];
+                const ratio = arr[arr.length - i] / arr[arr.length - i - 1];
                 if (ratio >= THROUGHPUT_INCREASE_SCALE || ratio <= 1 / THROUGHPUT_DECREASE_SCALE) {
                     sampleSize += 1;
                     if (sampleSize === arr.length) { // cannot increase sampleSize beyond arr.length