Build in Nodejs split function VS bash 'sed & tr' command

split-vs-sed.js

/**
 * Usage:
 *  $npm install shelljs
 *  $node split-vs-sed.js
 */
 
/**
 * Results:
 * 
 * $ node split-vs-sed.js
 *  Node split() time: 6106ms
 *  Tr + Sed time:     6324ms
 *  Sed regexp time:   6251ms
 */

var shelljs = require('shelljs');
var exec = shelljs.exec;

shelljs.config.silent = true;

exec('mkdir -p /tmp/disks/0/configs && echo \'"id": "10ecc78a910-"\' | dd of=/tmp/disks/0/configs/ctr.json');
exec('mkdir -p /tmp/disks/1/configs && echo \'"id": "10ecc78a9106"\' | dd of=/tmp/disks/1/configs/ctr.json');
exec('mkdir -p /tmp/disks/2/configs && echo \'"id": "10ecc78a910+"\' | dd of=/tmp/disks/2/configs/ctr.json');

var command = 'find /tmp/disks/* -type f -name ctr.json -exec grep -sl \'"id": "10ecc78a9106"\' {} \\;';
var commandSed = '| tr "/" "\\n" | sed -n 4p | tr -d "\\n"';
var commandSedRegExp = '| sed \'s#^[^0-9]*\\([0-9]*\\).*$#\\1#\' | tr -d "\\n"';

var count = 100;

console.log('Node split() time [ ' + command + ' ]:');
console.time(' ');
for (var i = 0; i < count; i++) {
    process.stdout.write(exec(command).output.split('/')[3]);
}
console.timeEnd(' ');

console.log('Tr + Sed time [ ' + command + ' ' + commandSed + ' ]:');
console.time(' ');
for (var i = 0; i < count; i++) {
    process.stdout.write(exec(command + commandSed).output);
}
console.timeEnd(' ');

console.log('Sed regexp time [ ' + command + ' ' + commandSedRegExp + ' ]:');
console.time(' ');
for (var i = 0; i < count; i++) {
    process.stdout.write(exec(command + commandSedRegExp).output);
}
console.timeEnd(' ');