From ecf2434c34f6d37188c51e8fccf67b6d1f04ecf0 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.
---
 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)