benchmark: cut down http benchmark run time

PR-URL: #18379
Reviewed-By: Jon Moss <me@jonathanmoss.me>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>

benchmark/_http-benchmarkers.js

@@ -185,7 +185,7 @@ exports.run = function(options, callback) {
     port: exports.PORT,
     path: '/',
     connections: 100,
-    duration: 10,
+    duration: 5,
     benchmarker: exports.default_http_benchmarker
   }, options);
   if (!options.benchmarker) {

benchmark/http/set-header.js

@@ -0,0 +1,32 @@
+'use strict';
+const common = require('../common.js');
+const PORT = common.PORT;
+
+const bench = common.createBenchmark(main, {
+  res: ['normal', 'setHeader', 'setHeaderWH']
+});
+
+const type = 'bytes';
+const len = 4;
+const chunks = 0;
+const chunkedEnc = 0;
+const c = 50;
+
+// normal: writeHead(status, {...})
+// setHeader: statusCode = status, setHeader(...) x2
+// setHeaderWH: setHeader(...), writeHead(status, ...)
+function main({ res }) {
+  process.env.PORT = PORT;
+  var server = require('../fixtures/simple-http-server.js')
+  .listen(PORT)
+  .on('listening', function() {
+    const path = `/${type}/${len}/${chunks}/normal/${chunkedEnc}`;
+
+    bench.http({
+      path: path,
+      connections: c
+    }, function() {
+      server.close();
+    });
+  });
+}

benchmark/http/simple.js

@@ -7,15 +7,14 @@ const bench = common.createBenchmark(main, {
   len: [4, 1024, 102400],
   chunks: [1, 4],
   c: [50, 500],
-  chunkedEnc: [1, 0],
-  res: ['normal', 'setHeader', 'setHeaderWH']
+  chunkedEnc: [1, 0]
 });
 
 function main({ type, len, chunks, c, chunkedEnc, res }) {
   var server = require('../fixtures/simple-http-server.js')
   .listen(common.PORT)
   .on('listening', function() {
-    const path = `/${type}/${len}/${chunks}/${res}/${chunkedEnc}`;
+    const path = `/${type}/${len}/${chunks}/normal/${chunkedEnc}`;
 
     bench.http({
       path: path,