From 9ed2a6d2c935e2c4671568951fee044561df0174 Mon Sep 17 00:00:00 2001
From: Gerhard Stoebich <18708370+Flarna@users.noreply.github.com>
Date: Fri, 15 Mar 2019 21:03:18 +0100
Subject: [PATCH] perf_hooks: reset prev_ before starting ELD timer

reset `ELDHistogram.prev_` before staring timer to ensure that start
timer doesn't leak across `disable()` `enable()` calls.

PR-URL: https://github.com/nodejs/node/pull/26693
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Yongsheng Zhang <zyszys98@gmail.com>
---
 src/node_perf.cc | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/node_perf.cc b/src/node_perf.cc
index e16be29a872f80..1ca5cd5e01ea47 100644
--- a/src/node_perf.cc
+++ b/src/node_perf.cc
@@ -539,6 +539,7 @@ bool ELDHistogram::RecordDelta() {
 bool ELDHistogram::Enable() {
   if (enabled_) return false;
   enabled_ = true;
+  prev_ = 0;
   uv_timer_start(timer_,
                  ELDHistogramDelayInterval,
                  resolution_,