benchmark: reduce string concatenations

PR-URL: https://github.com/nodejs/node/pull/12455
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

4 files changed, 5 insertions, 6 deletions

diff --git a/benchmark/http/_chunky_http_client.js b/benchmark/http/_chunky_http_client.js
index 55f914c6df..d235a5e04a 100644
--- a/benchmark/http/_chunky_http_client.js
+++ b/benchmark/http/_chunky_http_client.js
@@ -37,7 +37,7 @@ function main(conf) {
     for (var i = 0; i < extra_header_count; i++) {
       // Utilize first three powers of a small integer for an odd cycle and
       // because the fourth power of some integers overloads the server.
-      todo.push('X-Header-' + i + ': ' + headers[i % 3]);
+      todo.push(`X-Header-${i}: ${headers[i % 3]}`);
     }
     todo.push('');
     todo.push('');
diff --git a/benchmark/http/cluster.js b/benchmark/http/cluster.js
index 464bcfdb63..3a9392c422 100644
--- a/benchmark/http/cluster.js
+++ b/benchmark/http/cluster.js
@@ -27,7 +27,7 @@ function main(conf) {
       return;
 
     setTimeout(function() {
-      var path = '/' + conf.type + '/' + conf.len;
+      var path = `/${conf.type}/${conf.len}`;
 
       bench.http({
         path: path,
diff --git a/benchmark/http/http_server_for_chunky_client.js b/benchmark/http/http_server_for_chunky_client.js
index e58ba5f5a1..bdeb517344 100644
--- a/benchmark/http/http_server_for_chunky_client.js
+++ b/benchmark/http/http_server_for_chunky_client.js
@@ -6,7 +6,7 @@ var fs = require('fs');
 var fork = require('child_process').fork;
 var common = require('../common.js');
 var test = require('../../test/common.js');
-var pep = path.dirname(process.argv[1]) + '/_chunky_http_client.js';
+var pep = `${path.dirname(process.argv[1])}/_chunky_http_client.js`;
 var PIPE = test.PIPE;
 
 try {
@@ -30,7 +30,7 @@ server = http.createServer(function(req, res) {
 });
 
 server.on('error', function(err) {
-  throw new Error('server error: ' + err);
+  throw new Error(`server error: ${err}`);
 });
 
 server.listen(PIPE);
diff --git a/benchmark/http/simple.js b/benchmark/http/simple.js
index c773e71791..81b7cb5afb 100644
--- a/benchmark/http/simple.js
+++ b/benchmark/http/simple.js
@@ -16,8 +16,7 @@ function main(conf) {
   var server = require('../fixtures/simple-http-server.js')
   .listen(process.env.PORT || common.PORT)
   .on('listening', function() {
-    var path = '/' + conf.type + '/' + conf.len + '/' + conf.chunks + '/' +
-               conf.res;
+    var path = `/${conf.type}/${conf.len}/${conf.chunks}/${conf.res}`;
 
     bench.http({
       path: path,