diff --git a/benchmarks/diff_multi_bench_output.js.abc b/benchmarks/diff_multi_bench_output.js.abc
deleted file mode 100755
index 7432d14407..0000000000
--- a/benchmarks/diff_multi_bench_output.js.abc
+++ /dev/null
@@ -1,91 +0,0 @@
-'use strict'
-
-// `node diffMultiBenchOutput.js beforeBench.txt afterBench.txt`
-
-var fs = require('fs')
-var file1 = process.argv[2]
-var file2 = process.argv[3]
-
-if (!file1 || !file2) {
-  console.log('Please supply two file arguments:')
-  var n = __filename
-  n = n.substring(n.lastIndexOf('/', n.length))
-  console.log('    node .' + n + ' benchBefore.txt benchAfter.txt\n')
-  console.log('To generate the benchmark files, run')
-  console.log('    npm run benchmark > benchBefore.txt\n')
-  console.log('Thank you for benchmarking responsibly.')
-  process.exit(1)
-}
-
-var beforeLines = fs.readFileSync(file1, 'utf8').split('\n')
-var afterLines = fs.readFileSync(file2, 'utf8').split('\n')
-
-console.log('Comparing before,', file1, '(', beforeLines.length, 'lines)', 'to after,', file2, '(', afterLines.length, 'lines)')
-
-function isWhitespace (s) {
-  return !!s.trim()
-}
-
-function pad (input, len, chr, right) {
-  var str = input.toString()
-  chr = chr || ' '
-
-  if (right) {
-    while (str.length < len) {
-      str += chr
-    }
-  } else {
-    while (str.length < len) {
-      str = chr + str
-    }
-  }
-  return str
-}
-
-// green if greater than 0, red otherwise
-function humanizeDiff (num, unit, toFixed) {
-  unit = unit || ''
-  if (num > 0) {
-    return ' +' + pad(num.toFixed(toFixed || 0) + unit, 7)
-  }
-  return ' -' + pad(Math.abs(num).toFixed(toFixed || 0) + unit, 7)
-}
-
-function commandName (words) {
-  var line = words.join(' ')
-  return line.substr(0, line.indexOf(','))
-}
-
-beforeLines.forEach(function (b, i) {
-  var a = afterLines[i]
-  if (!a || !b || !b.trim() || !a.trim()) {
-    // console.log('#ignored#', '>'+a+'<', '>'+b+'<');
-    return
-  }
-  var bWords = b.split(' ').filter(isWhitespace)
-  var aWords = a.split(' ').filter(isWhitespace)
-
-  var ops = [bWords, aWords].map(function (words) {
-    // console.log(words);
-    return words.slice(-2, -1) | 0
-  }).filter(function (num) {
-    var isNaN = !num && num !== 0
-    return !isNaN
-  })
-  if (ops.length !== 2) {
-    return
-  }
-  var delta = ops[1] - ops[0]
-  var pct = +((delta / ops[0]) * 100)
-  ops[0] = pad(ops[0], 6)
-  ops[1] = pad(ops[1], 6)
-  delta = humanizeDiff(delta)
-  var smallDelta = pct < 3 && pct > -3
-  // Let's mark differences above 20% bold
-  var bigDelta = pct > 20 || pct < -20 ? ';1' : ''
-  pct = humanizeDiff(pct, '', 2) + '%'
-  var str = pad((commandName(aWords) === commandName(bWords) ? commandName(aWords) + ':' : '404:'), 14, false, true) +
-        (pad(ops.join(' -> '), 15) + ' ops/sec (∆' + delta + pct + ')')
-  str = (smallDelta ? '' : (/-[^>]/.test(str) ? '\x1b[31' : '\x1b[32') + bigDelta + 'm') + str + '\x1b[0m'
-  console.log(str)
-})