diff --git a/benchmark/util/normalize-encoding.js b/benchmark/util/normalize-encoding.js
index 2cdfd54442114d..96eab1912d0761 100644
--- a/benchmark/util/normalize-encoding.js
+++ b/benchmark/util/normalize-encoding.js
@@ -47,11 +47,9 @@ function getInput(input) {
   }
 }
 
-function main(conf) {
-  const normalizeEncoding = require('internal/util').normalizeEncoding;
-
-  const n = conf.n | 0;
-  const inputs = getInput(conf.input);
+function main({ input, n }) {
+  const { normalizeEncoding } = require('internal/util');
+  const inputs = getInput(input);
   var noDead = '';
 
   bench.start();
diff --git a/benchmark/util/type-check.js b/benchmark/util/type-check.js
index ee8dd7e4ece188..e1d1ac553fedcf 100644
--- a/benchmark/util/type-check.js
+++ b/benchmark/util/type-check.js
@@ -34,16 +34,15 @@ const bench = common.createBenchmark(main, {
   flags: ['--expose-internals']
 });
 
-function main(conf) {
+function main({ type, argument, version, n }) {
   // For testing, if supplied with an empty type, default to ArrayBufferView.
-  conf.type = conf.type || 'ArrayBufferView';
+  type = type || 'ArrayBufferView';
 
   const util = process.binding('util');
   const types = require('internal/util/types');
 
-  const n = (+conf.n) | 0;
-  const func = { native: util, js: types }[conf.version][`is${conf.type}`];
-  const arg = args[conf.type][conf.argument];
+  const func = { native: util, js: types }[version][`is${type}`];
+  const arg = args[type][argument];
 
   bench.start();
   for (var i = 0; i < n; i++) {
diff --git a/benchmark/v8/get-stats.js b/benchmark/v8/get-stats.js
index 96de7572397161..6ee742858629c2 100644
--- a/benchmark/v8/get-stats.js
+++ b/benchmark/v8/get-stats.js
@@ -11,9 +11,7 @@ const bench = common.createBenchmark(main, {
   n: [1e6]
 });
 
-function main(conf) {
-  const n = +conf.n;
-  const method = conf.method;
+function main({ method, n }) {
   var i = 0;
   bench.start();
   for (; i < n; i++)
diff --git a/benchmark/vm/run-in-context.js b/benchmark/vm/run-in-context.js
index 6e26a6d0ebeb38..da8f56a6e0153b 100644
--- a/benchmark/vm/run-in-context.js
+++ b/benchmark/vm/run-in-context.js
@@ -10,10 +10,8 @@ const bench = common.createBenchmark(main, {
 
 const vm = require('vm');
 
-function main(conf) {
-  const n = +conf.n;
-  const options = conf.breakOnSigint ? { breakOnSigint: true } : {};
-  const withSigintListener = !!conf.withSigintListener;
+function main({ n, breakOnSigint, withSigintListener }) {
+  const options = breakOnSigint ? { breakOnSigint: true } : {};
 
   process.removeAllListeners('SIGINT');
   if (withSigintListener)
diff --git a/benchmark/vm/run-in-this-context.js b/benchmark/vm/run-in-this-context.js
index a0c737f46954f1..33fd3a34d81f8f 100644
--- a/benchmark/vm/run-in-this-context.js
+++ b/benchmark/vm/run-in-this-context.js
@@ -10,10 +10,8 @@ const bench = common.createBenchmark(main, {
 
 const vm = require('vm');
 
-function main(conf) {
-  const n = +conf.n;
-  const options = conf.breakOnSigint ? { breakOnSigint: true } : {};
-  const withSigintListener = !!conf.withSigintListener;
+function main({ n, breakOnSigint, withSigintListener }) {
+  const options = breakOnSigint ? { breakOnSigint: true } : {};
 
   process.removeAllListeners('SIGINT');
   if (withSigintListener)