benchmark,lib: change var to const

Refs: #26679

PR-URL: #26915
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: Refael Ackermann <refack@gmail.com>

Author: BridgeAR

benchmark/fs/readfile-partitioned.js

@@ -29,7 +29,7 @@ function main(conf) {
   fs.writeFileSync(filename, data);
   data = null;
 
-  var zipData = Buffer.alloc(1024, 'a');
+  const zipData = Buffer.alloc(1024, 'a');
 
   var reads = 0;
   var zips = 0;

benchmark/fs/write-stream-throughput.js

@@ -38,7 +38,7 @@ function main({ dur, encodingType, size }) {
   var started = false;
   var ended = false;
 
-  var f = fs.createWriteStream(filename);
+  const f = fs.createWriteStream(filename);
   f.on('drain', write);
   f.on('open', write);
   f.on('close', done);

benchmark/http/_chunky_http_client.js

@@ -54,7 +54,7 @@ function main({ len, n }) {
   const add = 11;
   var count = 0;
   const PIPE = process.env.PIPE_NAME;
-  var socket = net.connect(PIPE, () => {
+  const socket = net.connect(PIPE, () => {
     bench.start();
     WriteHTTPHeaders(socket, 1, len);
     socket.setEncoding('utf8');

benchmark/http/http_server_for_chunky_client.js

@@ -10,9 +10,7 @@ process.env.PIPE_NAME = PIPE;
 
 tmpdir.refresh();
 
-var server;
-
-server = http.createServer((req, res) => {
+const server = http.createServer((req, res) => {
   const headers = {
     'content-type': 'text/plain',
     'content-length': '2'

benchmark/http/set-header.js

@@ -17,7 +17,7 @@ const c = 50;
 // setHeaderWH: setHeader(...), writeHead(status, ...)
 function main({ res }) {
   process.env.PORT = PORT;
-  var server = require('../fixtures/simple-http-server.js')
+  const server = require('../fixtures/simple-http-server.js')
   .listen(PORT)
   .on('listening', () => {
     const path = `/${type}/${len}/${chunks}/normal/${chunkedEnc}`;

benchmark/http/simple.js

@@ -11,7 +11,7 @@ const bench = common.createBenchmark(main, {
 });
 
 function main({ type, len, chunks, c, chunkedEnc, res }) {
-  var server = require('../fixtures/simple-http-server.js')
+  const server = require('../fixtures/simple-http-server.js')
   .listen(common.PORT)
   .on('listening', () => {
     const path = `/${type}/${len}/${chunks}/normal/${chunkedEnc}`;

benchmark/http/upgrade.js

@@ -19,7 +19,7 @@ const resData = 'HTTP/1.1 101 Web Socket Protocol Handshake\r\n' +
                 '\r\n\r\n';
 
 function main({ n }) {
-  var server = require('../fixtures/simple-http-server.js')
+  const server = require('../fixtures/simple-http-server.js')
     .listen(common.PORT)
     .on('listening', () => {
       bench.start();

benchmark/tls/throughput.js

@@ -14,7 +14,6 @@ const tls = require('tls');
 
 function main({ dur, type, size }) {
   var encoding;
-  var server;
   var chunk;
   switch (type) {
     case 'buf':
@@ -39,7 +38,7 @@ function main({ dur, type, size }) {
     ciphers: 'AES256-GCM-SHA384'
   };
 
-  server = tls.createServer(options, onConnection);
+  const server = tls.createServer(options, onConnection);
   var conn;
   server.listen(common.PORT, () => {
     const opt = { port: common.PORT, rejectUnauthorized: false };

benchmark/tls/tls-connect.js

@@ -46,7 +46,7 @@ function makeConnection() {
     port: common.PORT,
     rejectUnauthorized: false
   };
-  var conn = tls.connect(options, () => {
+  const conn = tls.connect(options, () => {
     clientConn++;
     conn.on('error', (er) => {
       console.error('client error', er);

lib/_http_agent.js

@@ -60,7 +60,7 @@ function Agent(options) {
   this.maxFreeSockets = this.options.maxFreeSockets || 256;
 
   this.on('free', (socket, options) => {
-    var name = this.getName(options);
+    const name = this.getName(options);
     debug('agent.on(free)', name);
 
     if (socket.writable &&
@@ -152,13 +152,13 @@ Agent.prototype.addRequest = function addRequest(req, options, port/* legacy */,
   if (!options.servername)
     options.servername = calculateServerName(options, req);
 
-  var name = this.getName(options);
+  const name = this.getName(options);
   if (!this.sockets[name]) {
     this.sockets[name] = [];
   }
 
-  var freeLen = this.freeSockets[name] ? this.freeSockets[name].length : 0;
-  var sockLen = freeLen + this.sockets[name].length;
+  const freeLen = this.freeSockets[name] ? this.freeSockets[name].length : 0;
+  const sockLen = freeLen + this.sockets[name].length;
 
   if (freeLen) {
     // We have a free socket, so use that.
@@ -199,7 +199,7 @@ Agent.prototype.createSocket = function createSocket(req, options, cb) {
   if (!options.servername)
     options.servername = calculateServerName(options, req);
 
-  var name = this.getName(options);
+  const name = this.getName(options);
   options._agentKey = name;
 
   debug('createConnection', name, options);
@@ -279,9 +279,9 @@ function installListeners(agent, s, options) {
 }
 
 Agent.prototype.removeSocket = function removeSocket(s, options) {
-  var name = this.getName(options);
+  const name = this.getName(options);
   debug('removeSocket', name, 'writable:', s.writable);
-  var sets = [this.sockets];
+  const sets = [this.sockets];
 
   // If the socket was destroyed, remove it from the free buffers too.
   if (!s.writable)
@@ -323,7 +323,7 @@ Agent.prototype.reuseSocket = function reuseSocket(socket, req) {
 };
 
 Agent.prototype.destroy = function destroy() {
-  var sets = [this.freeSockets, this.sockets];
+  const sets = [this.freeSockets, this.sockets];
   for (var s = 0; s < sets.length; s++) {
     var set = sets[s];
     var keys = Object.keys(set);