diff --git a/benchmark/buffers/buffer-base64-decode-wrapped.js b/benchmark/buffers/buffer-base64-decode-wrapped.js
index 3140cd5525ad07..61e3bb654ee7c0 100644
--- a/benchmark/buffers/buffer-base64-decode-wrapped.js
+++ b/benchmark/buffers/buffer-base64-decode-wrapped.js
@@ -6,8 +6,7 @@ const bench = common.createBenchmark(main, {
   n: [32],
 });
 
-function main(conf) {
-  const n = +conf.n;
+function main({ n }) {
   const charsPerLine = 76;
   const linesCount = 8 << 16;
   const bytesCount = charsPerLine * linesCount / 4 * 3;
diff --git a/benchmark/buffers/buffer-base64-decode.js b/benchmark/buffers/buffer-base64-decode.js
index 6a9002df383a8f..492922fb2b6eac 100644
--- a/benchmark/buffers/buffer-base64-decode.js
+++ b/benchmark/buffers/buffer-base64-decode.js
@@ -6,8 +6,7 @@ const bench = common.createBenchmark(main, {
   n: [32],
 });
 
-function main(conf) {
-  const n = +conf.n;
+function main({ n }) {
   const s = 'abcd'.repeat(8 << 20);
   // eslint-disable-next-line no-unescaped-regexp-dot
   s.match(/./);  // Flatten string.
diff --git a/benchmark/buffers/buffer-base64-encode.js b/benchmark/buffers/buffer-base64-encode.js
index 509fcd9a33c9d4..d8b601bbd181f4 100644
--- a/benchmark/buffers/buffer-base64-encode.js
+++ b/benchmark/buffers/buffer-base64-encode.js
@@ -27,9 +27,7 @@ const bench = common.createBenchmark(main, {
   n: [32]
 });
 
-function main(conf) {
-  const n = +conf.n;
-  const len = +conf.len;
+function main({ n, len }) {
   const b = Buffer.allocUnsafe(len);
   let s = '';
   let i;
diff --git a/benchmark/buffers/buffer-bytelength.js b/benchmark/buffers/buffer-bytelength.js
index fc6dfcf2301eaf..0617b4feb3f140 100644
--- a/benchmark/buffers/buffer-bytelength.js
+++ b/benchmark/buffers/buffer-bytelength.js
@@ -15,11 +15,7 @@ const chars = [
   '𠜎𠜱𠝹𠱓𠱸𠲖𠳏𠳕𠴕𠵼𠵿𠸎𠸏𠹷𠺝𠺢' // 4 bytes
 ];
 
-function main(conf) {
-  const n = conf.n | 0;
-  const len = conf.len | 0;
-  const encoding = conf.encoding;
-
+function main({ n, len, encoding }) {
   var strings = [];
   var results;
   if (encoding === 'buffer') {
diff --git a/benchmark/buffers/buffer-compare-instance-method.js b/benchmark/buffers/buffer-compare-instance-method.js
index ff3bc4c1abda98..a3433803b79537 100644
--- a/benchmark/buffers/buffer-compare-instance-method.js
+++ b/benchmark/buffers/buffer-compare-instance-method.js
@@ -7,10 +7,8 @@ const bench = common.createBenchmark(main, {
   millions: [1]
 });
 
-function main(conf) {
-  const iter = (conf.millions >>> 0) * 1e6;
-  const size = (conf.size >>> 0);
-  const args = (conf.args >>> 0);
+function main({ millions, size, args }) {
+  const iter = millions * 1e6;
   const b0 = Buffer.alloc(size, 'a');
   const b1 = Buffer.alloc(size, 'a');
   const b0Len = b0.length;
diff --git a/benchmark/buffers/buffer-compare-offset.js b/benchmark/buffers/buffer-compare-offset.js
index 96719abfbe5618..850fe11d3f429e 100644
--- a/benchmark/buffers/buffer-compare-offset.js
+++ b/benchmark/buffers/buffer-compare-offset.js
@@ -23,13 +23,11 @@ function compareUsingOffset(b0, b1, len, iter) {
   bench.end(iter / 1e6);
 }
 
-function main(conf) {
-  const iter = (conf.millions >>> 0) * 1e6;
-  const size = (conf.size >>> 0);
-  const method =
-    conf.method === 'slice' ? compareUsingSlice : compareUsingOffset;
-  method(Buffer.alloc(size, 'a'),
-         Buffer.alloc(size, 'b'),
-         size >> 1,
-         iter);
+function main({ millions, size, method }) {
+  const iter = millions * 1e6;
+  const fn = method === 'slice' ? compareUsingSlice : compareUsingOffset;
+  fn(Buffer.alloc(size, 'a'),
+     Buffer.alloc(size, 'b'),
+     size >> 1,
+     iter);
 }
diff --git a/benchmark/buffers/buffer-compare.js b/benchmark/buffers/buffer-compare.js
index ad6519cd102340..f7abb4b3d94ffa 100644
--- a/benchmark/buffers/buffer-compare.js
+++ b/benchmark/buffers/buffer-compare.js
@@ -27,9 +27,8 @@ const bench = common.createBenchmark(main, {
   millions: [1]
 });
 
-function main(conf) {
-  const iter = (conf.millions >>> 0) * 1e6;
-  const size = (conf.size >>> 0);
+function main({ millions, size }) {
+  const iter = millions * 1e6;
   const b0 = Buffer.alloc(size, 'a');
   const b1 = Buffer.alloc(size, 'a');
 
diff --git a/benchmark/buffers/buffer-concat.js b/benchmark/buffers/buffer-concat.js
index a27e132193ef41..3f9cffc06a6a7e 100644
--- a/benchmark/buffers/buffer-concat.js
+++ b/benchmark/buffers/buffer-concat.js
@@ -8,15 +8,11 @@ const bench = common.createBenchmark(main, {
   n: [1024]
 });
 
-function main(conf) {
-  const n = +conf.n;
-  const size = +conf.pieceSize;
-  const pieces = +conf.pieces;
-
+function main({ n, pieces, pieceSize, withTotalLength }) {
   const list = new Array(pieces);
-  list.fill(Buffer.allocUnsafe(size));
+  list.fill(Buffer.allocUnsafe(pieceSize));
 
-  const totalLength = conf.withTotalLength ? pieces * size : undefined;
+  const totalLength = withTotalLength ? pieces * pieceSize : undefined;
 
   bench.start();
   for (var i = 0; i < n * 1024; i++) {
diff --git a/benchmark/buffers/buffer-creation.js b/benchmark/buffers/buffer-creation.js
index 4ca0a049228f6c..73e620955e91db 100644
--- a/benchmark/buffers/buffer-creation.js
+++ b/benchmark/buffers/buffer-creation.js
@@ -15,10 +15,8 @@ const bench = common.createBenchmark(main, {
   n: [1024]
 });
 
-function main(conf) {
-  const len = +conf.len;
-  const n = +conf.n;
-  switch (conf.type) {
+function main({ len, n, type }) {
+  switch (type) {
     case '':
     case 'fast-alloc':
       bench.start();
diff --git a/benchmark/buffers/buffer-from.js b/benchmark/buffers/buffer-from.js
index 50cfbc887aa0b9..6f2358bcf296ab 100644
--- a/benchmark/buffers/buffer-from.js
+++ b/benchmark/buffers/buffer-from.js
@@ -18,10 +18,7 @@ const bench = common.createBenchmark(main, {
   n: [2048]
 });
 
-function main(conf) {
-  const len = +conf.len;
-  const n = +conf.n;
-
+function main({ len, n, source }) {
   const array = new Array(len).fill(42);
   const arrayBuf = new ArrayBuffer(len);
   const str = 'a'.repeat(len);
@@ -31,7 +28,7 @@ function main(conf) {
 
   var i;
 
-  switch (conf.source) {
+  switch (source) {
     case 'array':
       bench.start();
       for (i = 0; i < n * 1024; i++) {
diff --git a/benchmark/buffers/buffer-hex.js b/benchmark/buffers/buffer-hex.js
index d05bb832b3068c..1bdef81139ffe7 100644
--- a/benchmark/buffers/buffer-hex.js
+++ b/benchmark/buffers/buffer-hex.js
@@ -7,9 +7,7 @@ const bench = common.createBenchmark(main, {
   n: [1e7]
 });
 
-function main(conf) {
-  const len = conf.len | 0;
-  const n = conf.n | 0;
+function main({ len, n }) {
   const buf = Buffer.alloc(len);
 
   for (let i = 0; i < buf.length; i++)
diff --git a/benchmark/buffers/buffer-indexof-number.js b/benchmark/buffers/buffer-indexof-number.js
index 2e6e10b9f33d40..91bff0d54bb7eb 100644
--- a/benchmark/buffers/buffer-indexof-number.js
+++ b/benchmark/buffers/buffer-indexof-number.js
@@ -8,16 +8,14 @@ const bench = common.createBenchmark(main, {
   n: [1e7]
 });
 
-function main(conf) {
-  const n = +conf.n;
-  const search = +conf.value;
+function main({ n, value }) {
   const aliceBuffer = fs.readFileSync(
     path.resolve(__dirname, '../fixtures/alice.html')
   );
 
   bench.start();
   for (var i = 0; i < n; i++) {
-    aliceBuffer.indexOf(search, 0, undefined);
+    aliceBuffer.indexOf(value, 0, undefined);
   }
   bench.end(n);
 }
diff --git a/benchmark/buffers/buffer-indexof.js b/benchmark/buffers/buffer-indexof.js
index 1545475269a025..c98d15320aaaae 100644
--- a/benchmark/buffers/buffer-indexof.js
+++ b/benchmark/buffers/buffer-indexof.js
@@ -25,16 +25,13 @@ const bench = common.createBenchmark(main, {
   search: searchStrings,
   encoding: ['undefined', 'utf8', 'ucs2', 'binary'],
   type: ['buffer', 'string'],
-  iter: [1]
+  iter: [100000]
 });
 
-function main(conf) {
-  const iter = (conf.iter) * 100000;
+function main({ iter, search, encoding, type }) {
   var aliceBuffer = fs.readFileSync(
     path.resolve(__dirname, '../fixtures/alice.html')
   );
-  var search = conf.search;
-  var encoding = conf.encoding;
 
   if (encoding === 'undefined') {
     encoding = undefined;
@@ -44,7 +41,7 @@ function main(conf) {
     aliceBuffer = Buffer.from(aliceBuffer.toString(), encoding);
   }
 
-  if (conf.type === 'buffer') {
+  if (type === 'buffer') {
     search = Buffer.from(Buffer.from(search).toString(), encoding);
   }
 
diff --git a/benchmark/buffers/buffer-iterate.js b/benchmark/buffers/buffer-iterate.js
index 4e911caa72ce14..8531e1cae82115 100644
--- a/benchmark/buffers/buffer-iterate.js
+++ b/benchmark/buffers/buffer-iterate.js
@@ -16,14 +16,11 @@ const methods = {
   'iterator': benchIterator
 };
 
-function main(conf) {
-  const len = +conf.size;
-  const clazz = conf.type === 'fast' ? Buffer : SlowBuffer;
-  const buffer = new clazz(len);
+function main({ size, type, method, n }) {
+  const clazz = type === 'fast' ? Buffer : SlowBuffer;
+  const buffer = new clazz(size);
   buffer.fill(0);
-
-  const method = conf.method || 'for';
-  methods[method](buffer, conf.n);
+  methods[method || 'for'](buffer, n);
 }
 
 
diff --git a/benchmark/buffers/buffer-read.js b/benchmark/buffers/buffer-read.js
index 339da75befce4d..41e842f3123623 100644
--- a/benchmark/buffers/buffer-read.js
+++ b/benchmark/buffers/buffer-read.js
@@ -25,13 +25,12 @@ const bench = common.createBenchmark(main, {
   millions: [1]
 });
 
-function main(conf) {
-  const noAssert = conf.noAssert === 'true';
-  const len = +conf.millions * 1e6;
-  const clazz = conf.buf === 'fast' ? Buffer : require('buffer').SlowBuffer;
+function main({ noAssert, millions, buf, type }) {
+  noAssert = noAssert === 'true';
+  const len = millions * 1e6;
+  const clazz = buf === 'fast' ? Buffer : require('buffer').SlowBuffer;
   const buff = new clazz(8);
-  const type = conf.type || 'UInt8';
-  const fn = `read${type}`;
+  const fn = `read${type || 'UInt8'}`;
 
   buff.writeDoubleLE(0, 0, noAssert);
   const testFunction = new Function('buff', `
diff --git a/benchmark/buffers/buffer-slice.js b/benchmark/buffers/buffer-slice.js
index 0067d02d8c7931..2e52475da91866 100644
--- a/benchmark/buffers/buffer-slice.js
+++ b/benchmark/buffers/buffer-slice.js
@@ -10,9 +10,8 @@ const bench = common.createBenchmark(main, {
 const buf = Buffer.allocUnsafe(1024);
 const slowBuf = new SlowBuffer(1024);
 
-function main(conf) {
-  const n = +conf.n;
-  const b = conf.type === 'fast' ? buf : slowBuf;
+function main({ n, type }) {
+  const b = type === 'fast' ? buf : slowBuf;
   bench.start();
   for (var i = 0; i < n * 1024; i++) {
     b.slice(10, 256);
diff --git a/benchmark/buffers/buffer-swap.js b/benchmark/buffers/buffer-swap.js
index 05cde002943f4a..8f6e1f51d3a0f2 100644
--- a/benchmark/buffers/buffer-swap.js
+++ b/benchmark/buffers/buffer-swap.js
@@ -72,13 +72,9 @@ function genMethod(method) {
   return (new Function(fnString))();
 }
 
-function main(conf) {
-  const method = conf.method || 'swap16';
-  const len = conf.len | 0;
-  const n = conf.n | 0;
-  const aligned = conf.aligned || 'true';
+function main({ method, len, n, aligned = 'true' }) {
   const buf = createBuffer(len, aligned === 'true');
-  const bufferSwap = genMethod(method);
+  const bufferSwap = genMethod(method || 'swap16');
 
   bufferSwap(n, buf);
   bench.start();
diff --git a/benchmark/buffers/buffer-tojson.js b/benchmark/buffers/buffer-tojson.js
index 19a6fe89474838..71936fb622eae6 100644
--- a/benchmark/buffers/buffer-tojson.js
+++ b/benchmark/buffers/buffer-tojson.js
@@ -7,9 +7,8 @@ const bench = common.createBenchmark(main, {
   len: [0, 10, 256, 4 * 1024]
 });
 
-function main(conf) {
-  const n = +conf.n;
-  const buf = Buffer.allocUnsafe(+conf.len);
+function main({ n, len }) {
+  const buf = Buffer.allocUnsafe(len);
 
   bench.start();
   for (var i = 0; i < n; ++i)
diff --git a/benchmark/buffers/buffer-tostring.js b/benchmark/buffers/buffer-tostring.js
index 49916fca4023ca..b2a14d8aec55ce 100644
--- a/benchmark/buffers/buffer-tostring.js
+++ b/benchmark/buffers/buffer-tostring.js
@@ -9,11 +9,7 @@ const bench = common.createBenchmark(main, {
   n: [1e7]
 });
 
-function main(conf) {
-  var encoding = conf.encoding;
-  const args = conf.args | 0;
-  const len = conf.len | 0;
-  const n = conf.n | 0;
+function main({ encoding, args, len, n }) {
   const buf = Buffer.alloc(len, 42);
 
   if (encoding.length === 0)
diff --git a/benchmark/buffers/buffer-write-string.js b/benchmark/buffers/buffer-write-string.js
index 927aa0b68466ef..37d4fda52c04e3 100644
--- a/benchmark/buffers/buffer-write-string.js
+++ b/benchmark/buffers/buffer-write-string.js
@@ -10,12 +10,7 @@ const bench = common.createBenchmark(main, {
   n: [1e7]
 });
 
-function main(conf) {
-  const len = +conf.len;
-  const n = +conf.n;
-  const encoding = conf.encoding;
-  const args = conf.args;
-
+function main({ len, n, encoding, args }) {
   const string = 'a'.repeat(len);
   const buf = Buffer.allocUnsafe(len);
 
diff --git a/benchmark/buffers/buffer-write.js b/benchmark/buffers/buffer-write.js
index b500a13dedcccd..ce2fbe3103cb83 100644
--- a/benchmark/buffers/buffer-write.js
+++ b/benchmark/buffers/buffer-write.js
@@ -45,13 +45,11 @@ const mod = {
   writeUInt32LE: UINT32
 };
 
-function main(conf) {
-  const noAssert = conf.noAssert === 'true';
-  const len = +conf.millions * 1e6;
-  const clazz = conf.buf === 'fast' ? Buffer : require('buffer').SlowBuffer;
+function main({ noAssert, millions, buf, type }) {
+  const len = millions * 1e6;
+  const clazz = buf === 'fast' ? Buffer : require('buffer').SlowBuffer;
   const buff = new clazz(8);
-  const type = conf.type || 'UInt8';
-  const fn = `write${type}`;
+  const fn = `write${type || 'UInt8'}`;
 
   if (/Int/.test(fn))
     benchInt(buff, fn, len, noAssert);
@@ -63,7 +61,7 @@ function benchInt(buff, fn, len, noAssert) {
   const m = mod[fn];
   const testFunction = new Function('buff', `
     for (var i = 0; i !== ${len}; i++) {
-      buff.${fn}(i & ${m}, 0, ${JSON.stringify(noAssert)});
+      buff.${fn}(i & ${m}, 0, ${noAssert});
     }
   `);
   bench.start();
@@ -74,7 +72,7 @@ function benchInt(buff, fn, len, noAssert) {
 function benchFloat(buff, fn, len, noAssert) {
   const testFunction = new Function('buff', `
     for (var i = 0; i !== ${len}; i++) {
-      buff.${fn}(i, 0, ${JSON.stringify(noAssert)});
+      buff.${fn}(i, 0, ${noAssert});
     }
   `);
   bench.start();
diff --git a/benchmark/buffers/buffer_zero.js b/benchmark/buffers/buffer_zero.js
index 06ca50bbb99ee7..06b68c313f1241 100644
--- a/benchmark/buffers/buffer_zero.js
+++ b/benchmark/buffers/buffer_zero.js
@@ -10,13 +10,12 @@ const bench = common.createBenchmark(main, {
 const zeroBuffer = Buffer.alloc(0);
 const zeroString = '';
 
-function main(conf) {
-  const n = +conf.n;
+function main({ n, type }) {
   bench.start();
 
-  if (conf.type === 'buffer')
+  if (type === 'buffer')
     for (let i = 0; i < n * 1024; i++) Buffer.from(zeroBuffer);
-  else if (conf.type === 'string')
+  else if (type === 'string')
     for (let i = 0; i < n * 1024; i++) Buffer.from(zeroString);
 
   bench.end(n);
diff --git a/benchmark/buffers/dataview-set.js b/benchmark/buffers/dataview-set.js
index 0dd4598ab7f1c5..ee5acfb1c1f72c 100644
--- a/benchmark/buffers/dataview-set.js
+++ b/benchmark/buffers/dataview-set.js
@@ -39,11 +39,11 @@ const mod = {
   setUint32: UINT32
 };
 
-function main(conf) {
-  const len = +conf.millions * 1e6;
+function main({ millions, type }) {
+  type = type || 'Uint8';
+  const len = millions * 1e6;
   const ab = new ArrayBuffer(8);
   const dv = new DataView(ab, 0, 8);
-  const type = conf.type || 'Uint8';
   const le = /LE$/.test(type);
   const fn = `set${type.replace(/[LB]E$/, '')}`;