diff --git a/benchmark/http/create-clientrequest.js b/benchmark/http/create-clientrequest.js
index 76468a49aa0835..24d6e020c63bc0 100644
--- a/benchmark/http/create-clientrequest.js
+++ b/benchmark/http/create-clientrequest.js
@@ -1,7 +1,9 @@
 'use strict';
 
 const common = require('../common.js');
-const ClientRequest = require('http').ClientRequest;
+const { ClientRequest } = require('http');
+const assert = require('assert');
+
 const types = Object.keys(common.urls)
   .filter((i) => common.urls[i]
   .startsWith('http://'));
@@ -15,36 +17,43 @@ const bench = common.createBenchmark(main, {
 function noop() {}
 
 function main({ url: type, arg, e }) {
-  e = +e;
+  e = Number(e);
   const data = common.bakeUrlData(type, e, false, false)
     .filter((i) => i.startsWith('http://'));
   const len = data.length;
-  var result;
-  var i;
-  if (arg === 'options') {
-    const options = data.map((i) => ({
-      path: new URL(i).path, createConnection: noop
-    }));
-    bench.start();
-    for (i = 0; i < len; i++) {
-      result = new ClientRequest(options[i]);
+  let result;
+  switch (arg) {
+    case 'options': {
+      const options = data.map((i) => ({
+        path: new URL(i).path, createConnection: noop
+      }));
+      bench.start();
+      for (let i = 0; i < len; i++) {
+        result = new ClientRequest(options[i]);
+      }
+      bench.end(len);
+      break;
+    }
+    case 'URL': {
+      const options = data.map((i) => new URL(i));
+      bench.start();
+      for (let i = 0; i < len; i++) {
+        result = new ClientRequest(options[i], { createConnection: noop });
+      }
+      bench.end(len);
+      break;
     }
-    bench.end(len);
-  } else if (arg === 'URL') {
-    const options = data.map((i) => new URL(i));
-    bench.start();
-    for (i = 0; i < len; i++) {
-      result = new ClientRequest(options[i], { createConnection: noop });
+    case 'string': {
+      bench.start();
+      for (let i = 0; i < len; i++) {
+        result = new ClientRequest(data[i], { createConnection: noop });
+      }
+      bench.end(len);
+      break;
     }
-    bench.end(len);
-  } else if (arg === 'string') {
-    bench.start();
-    for (i = 0; i < len; i++) {
-      result = new ClientRequest(data[i], { createConnection: noop });
+    default: {
+      throw new Error(`Unknown arg type ${arg}`);
     }
-    bench.end(len);
-  } else {
-    throw new Error(`Unknown arg type ${arg}`);
   }
-  require('assert').ok(result);
+  assert.ok(result);
 }
diff --git a/benchmark/http/headers.js b/benchmark/http/headers.js
index 60d800c20cf04f..8f611ae4743c93 100644
--- a/benchmark/http/headers.js
+++ b/benchmark/http/headers.js
@@ -4,21 +4,20 @@ const common = require('../common.js');
 const http = require('http');
 
 const bench = common.createBenchmark(main, {
-  duplicates: [1, 100],
   n: [10, 1000],
+  len: [1, 100],
 });
 
-function main({ duplicates, n }) {
+function main({ len, n }) {
   const headers = {
     'Connection': 'keep-alive',
     'Transfer-Encoding': 'chunked',
   };
 
-  for (var i = 0; i < n / duplicates; i++) {
-    headers[`foo${i}`] = [];
-    for (var j = 0; j < duplicates; j++) {
-      headers[`foo${i}`].push(`some header value ${i}`);
-    }
+  const Is = [ ...Array(n / len).keys() ];
+  const Js = [ ...Array(len).keys() ];
+  for (const i of Is) {
+    headers[`foo${i}`] = Js.map(() => `some header value ${i}`);
   }
 
   const server = http.createServer((req, res) => {
diff --git a/benchmark/http/incoming_headers.js b/benchmark/http/incoming_headers.js
index a1ab57e23876bf..7d9955766c7882 100644
--- a/benchmark/http/incoming_headers.js
+++ b/benchmark/http/incoming_headers.js
@@ -5,10 +5,10 @@ const http = require('http');
 const bench = common.createBenchmark(main, {
   // unicode confuses ab on os x.
   c: [50, 500],
-  headerDuplicates: [0, 5, 20]
+  n: [0, 5, 20]
 });
 
-function main({ c, headerDuplicates }) {
+function main({ c, n }) {
   const server = http.createServer((req, res) => {
     res.end();
   });
@@ -21,7 +21,7 @@ function main({ c, headerDuplicates }) {
       'Date': new Date().toString(),
       'Cache-Control': 'no-cache'
     };
-    for (let i = 0; i < headerDuplicates; i++) {
+    for (let i = 0; i < n; i++) {
       headers[`foo${i}`] = `some header value ${i}`;
     }
     bench.http({
diff --git a/test/benchmark/test-benchmark-http.js b/test/benchmark/test-benchmark-http.js
index d0c9ef175530bc..ed8423ba4c10cd 100644
--- a/test/benchmark/test-benchmark-http.js
+++ b/test/benchmark/test-benchmark-http.js
@@ -14,14 +14,12 @@ const runBenchmark = require('../common/benchmark');
 runBenchmark('http',
              [
                'benchmarker=test-double-http',
-               'c=1',
-               'e=0',
-               'url=long',
                'arg=string',
+               'c=1',
                'chunkedEnc=true',
                'chunks=0',
                'dur=0.1',
-               'duplicates=1',
+               'e=0',
                'input=keep-alive',
                'key=""',
                'len=1',
@@ -29,8 +27,8 @@ runBenchmark('http',
                'n=1',
                'res=normal',
                'type=asc',
+               'url=long',
                'value=X-Powered-By',
-               'headerDuplicates=1',
              ],
              {
                NODEJS_BENCHMARK_ZERO_ALLOWED: 1,