From b30c40bd5df6ff6bbc166ad217a49d9f047c0a74 Mon Sep 17 00:00:00 2001
From: Kirill Fomichev <fanatid@ya.ru>
Date: Tue, 3 Sep 2019 14:00:33 +0300
Subject: [PATCH] perf_hooks: import http2 only once

Import http2 internal bindings on each collectHttp2Stats call is not
required.

PR-URL: https://github.com/nodejs/node/pull/29419
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: David Carlier <devnexen@gmail.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Minwoo Jung <minwoo@nodesource.com>
---
 lib/perf_hooks.js | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lib/perf_hooks.js b/lib/perf_hooks.js
index 14b1aa44dddc26..453fc54eb95132 100644
--- a/lib/perf_hooks.js
+++ b/lib/perf_hooks.js
@@ -92,11 +92,12 @@ const IDX_SESSION_STATS_DATA_SENT = 6;
 const IDX_SESSION_STATS_DATA_RECEIVED = 7;
 const IDX_SESSION_STATS_MAX_CONCURRENT_STREAMS = 8;
 
+let http2;
 let sessionStats;
 let streamStats;
 
 function collectHttp2Stats(entry) {
-  const http2 = internalBinding('http2');
+  if (http2 === undefined) http2 = internalBinding('http2');
   switch (entry.name) {
     case 'Http2Stream':
       if (streamStats === undefined)