benchmark: refactor for consistent style

Code in benchmark directory sometimes uses `function () {}` for
anonymous callbacks and sometimes uses `() => {}`. Multi-line arrays
sometimes have a trailing comma and sometimes do not. Update to always
use arrow functions for anonymous callbacks and trailing commas for
multiline arrays.

PR-URL: #25944
Reviewed-By: Anto Aravinth <[email protected]>
Reviewed-By: James M Snell <[email protected]>

Author: Trott

benchmark/_cli.js

@@ -6,10 +6,8 @@ const path = require('path');
 // Create an object of all benchmark scripts
 const benchmarks = {};
 fs.readdirSync(__dirname)
-  .filter(function(name) {
-    return fs.statSync(path.resolve(__dirname, name)).isDirectory();
-  })
-  .forEach(function(category) {
+  .filter((name) => fs.statSync(path.resolve(__dirname, name)).isDirectory())
+  .forEach((category) => {
     benchmarks[category] = fs.readdirSync(path.resolve(__dirname, category))
       .filter((filename) => filename[0] !== '.' && filename[0] !== '_');
   });

benchmark/buffers/buffer-bytelength.js

@@ -12,7 +12,7 @@ const chars = [
   'hello brendan!!!', // 1 byte
   'ΰαβγδεζηθικλμνξο', // 2 bytes
   '挰挱挲挳挴挵挶挷挸挹挺挻挼挽挾挿', // 3 bytes
-  '𠜎𠜱𠝹𠱓𠱸𠲖𠳏𠳕𠴕𠵼𠵿𠸎𠸏𠹷𠺝𠺢' // 4 bytes
+  '𠜎𠜱𠝹𠱓𠱸𠲖𠳏𠳕𠴕𠵼𠵿𠸎𠸏𠹷𠺝𠺢', // 4 bytes
 ];
 
 function main({ n, len, encoding }) {
@@ -33,9 +33,7 @@ function main({ n, len, encoding }) {
     }
 
     // Check the result to ensure it is *properly* optimized
-    results = strings.map(function(val) {
-      return Buffer.byteLength(val, encoding);
-    });
+    results = strings.map((val) => Buffer.byteLength(val, encoding));
   }
 
   bench.start();

benchmark/buffers/buffer-fill.js

@@ -12,7 +12,7 @@ const bench = common.createBenchmark(main, {
     'fill("t", "utf8")',
     'fill("t", 0, "utf8")',
     'fill("t", 0)',
-    'fill(Buffer.alloc(1), 0)'
+    'fill(Buffer.alloc(1), 0)',
   ],
   size: [2 ** 8, 2 ** 13, 2 ** 16],
   n: [2e4]

benchmark/buffers/buffer-from.js

@@ -12,7 +12,7 @@ const bench = common.createBenchmark(main, {
     'string',
     'string-utf8',
     'string-base64',
-    'object'
+    'object',
   ],
   len: [10, 2048],
   n: [2048]

benchmark/buffers/buffer-indexof.js

@@ -18,7 +18,7 @@ const searchStrings = [
   'Soo--oop',
   'aaaaaaaaaaaaaaaaa',
   'venture to go near the house till she had brought herself down to',
-  '</i> to the Caterpillar'
+  '</i> to the Caterpillar',
 ];
 
 const bench = common.createBenchmark(main, {

benchmark/buffers/buffer-normalize-encoding.js

@@ -25,7 +25,7 @@ const bench = common.createBenchmark(main, {
     'utf16le',
     'UTF16LE',
     'utf8',
-    'UTF8'
+    'UTF8',
   ],
   n: [1e6]
 }, {

benchmark/buffers/buffer-read-with-byteLength.js

@@ -5,7 +5,7 @@ const types = [
   'IntBE',
   'IntLE',
   'UIntBE',
-  'UIntLE'
+  'UIntLE',
 ];
 
 const bench = common.createBenchmark(main, {

benchmark/buffers/buffer-read.js

@@ -15,7 +15,7 @@ const types = [
   'FloatLE',
   'FloatBE',
   'DoubleLE',
-  'DoubleBE'
+  'DoubleBE',
 ];
 
 const bench = common.createBenchmark(main, {

benchmark/buffers/buffer-write-string.js

@@ -3,7 +3,7 @@
 const common = require('../common.js');
 const bench = common.createBenchmark(main, {
   encoding: [
-    '', 'utf8', 'ascii', 'hex', 'UCS-2', 'utf16le', 'latin1', 'binary'
+    '', 'utf8', 'ascii', 'hex', 'UCS-2', 'utf16le', 'latin1', 'binary',
   ],
   args: [ '', 'offset', 'offset+length' ],
   len: [10, 2048],

benchmark/buffers/buffer-write.js

@@ -19,7 +19,7 @@ const types = [
   'FloatLE',
   'FloatBE',
   'DoubleLE',
-  'DoubleBE'
+  'DoubleBE',
 ];
 
 const bench = common.createBenchmark(main, {