buffer_vs_string.js

var kb = 10
var range = 1024 * kb

var paragraph = 'Vegan cornhole semiotics keffiyeh direct trade. Before they sold out fanny pack Carles scenester, keffiyeh High Life Austin flannel 8-bit. Fashion axe scenester Neutra, bicycle rights ethnic aesthetic sustainable letterpress. Pop-up mlkshk Schlitz meh Marfa kitsch pork belly, selvage street art. Dreamcatcher messenger bag Godard, viral ethnic keytar fanny pack post-ironic. Hashtag forage flexitarian hoodie DIY, banh mi shoreditch squid. Selvage master cleanse tote bag, trust fund fingerstache Odd Future you probably havent heard of them street art banjo single-origin coffee Bushwick.'
var paragraphLength = paragraph.length

var buffer = new  Buffer(range * paragraphLength)
var string = ""

var time = +new Date
for (var i = 0; i < range; i++) {
  buffer.write(paragraph, i * paragraphLength, paragraphLength, 'utf-8x')
}
console.log('buffer:', (+new Date) - time)

time = +new Date
for (var i = 0; i < range; i++) {
  string = string + paragraph
}
console.log('string:', (+new Date) - time)

/**
 * output (ms):
 * buffer: 24
 * string: 3
 */