benchmark: var to const

PR-URL: https://github.com/nodejs/node/pull/13757
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Gibson Fahnestock <gibfahn@gmail.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>

3 files changed, 7 insertions, 7 deletions

diff --git a/benchmark/child_process/child-process-exec-stdout.js b/benchmark/child_process/child-process-exec-stdout.js
index dcd352cfcf..1e78d445f8 100644
--- a/benchmark/child_process/child-process-exec-stdout.js
+++ b/benchmark/child_process/child-process-exec-stdout.js
@@ -3,7 +3,7 @@ const common = require('../common.js');
 const { exec, execSync } = require('child_process');
 const isWindows = process.platform === 'win32';
 
-var messagesLength = [64, 256, 1024, 4096];
+const messagesLength = [64, 256, 1024, 4096];
 // Windows does not support command lines longer than 8191 characters
 if (!isWindows) messagesLength.push(32768);
 
diff --git a/benchmark/child_process/child-process-read.js b/benchmark/child_process/child-process-read.js
index c1b834e431..91c9964e8d 100644
--- a/benchmark/child_process/child-process-read.js
+++ b/benchmark/child_process/child-process-read.js
@@ -7,7 +7,7 @@ const common = require('../common.js');
 const os = require('os');
 const child_process = require('child_process');
 
-var messagesLength = [64, 256, 1024, 4096];
+const messagesLength = [64, 256, 1024, 4096];
 // Windows does not support that long arguments
 if (os.platform() !== 'win32')
   messagesLength.push(32768);
diff --git a/benchmark/child_process/spawn-echo.js b/benchmark/child_process/spawn-echo.js
index 72822f87db..1ce40c3abf 100644
--- a/benchmark/child_process/spawn-echo.js
+++ b/benchmark/child_process/spawn-echo.js
@@ -1,12 +1,12 @@
 'use strict';
-var common = require('../common.js');
-var bench = common.createBenchmark(main, {
+const common = require('../common.js');
+const bench = common.createBenchmark(main, {
   n: [1000]
 });
 
-var spawn = require('child_process').spawn;
+const spawn = require('child_process').spawn;
 function main(conf) {
-  var n = +conf.n;
+  const n = +conf.n;
 
   bench.start();
   go(n, n);
@@ -16,7 +16,7 @@ function go(n, left) {
   if (--left === 0)
     return bench.end(n);
 
-  var child = spawn('echo', ['hello']);
+  const child = spawn('echo', ['hello']);
   child.on('exit', function(code) {
     if (code)
       process.exit(code);