Require Performance

[jamestalmage]

Start time: (2015-11-24 06:15:01 UTC) [treshold=1%,sorted]
# [order]  module                        time  %
   1 [43]  empower (node...er/index.js)  37ms  ▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇ 84%
   2 [36]  ./lib/decorat...ecorator.js)  33ms  ▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇ 75%
   3 [28]  escallmatch (...ch/index.js)  31ms  ▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇ 70%
   4  [9]  esprima (node.../esprima.js)  19ms  ▇▇▇▇▇▇▇▇▇▇▇▇▇ 43%
   5 [19]  espurify (nod...fy/index.js)   5ms  ▇▇▇▇ 11%
   6  [7]  chalk (node_m...lk/index.js)   4ms  ▇▇▇ 9%
   7 [42]  define-proper...es/index.js)   2ms  ▇▇ 5%
   8 [11]  estraverse (n...traverse.js)   2ms  ▇▇ 5%
   9 [35]  ./decorate (n...decorate.js)   2ms  ▇▇ 5%
  10 [16]  ./lib/create-...hitelist.js)   2ms  ▇▇ 5%
  11 [27]  deep-equal (n...al/index.js)   2ms  ▇▇ 5%
  12  [4]  ansi-styles (...i-styles.js)   1ms  ▇ 2%
  13 [37]  ./lib/captura...pturable.js)   1ms  ▇ 2%
  14  [5]  strip-ansi (n...si/index.js)   1ms  ▇ 2%
  15 [14]  object-keys (...ys/index.js)   1ms  ▇ 2%
  16  [6]  has-color (no...or/index.js)   1ms  ▇ 2%
  17  [0]  text-table (n...le/index.js)   1ms  ▇ 2%
  18 [17]  isarray (node...ay/index.js)   1ms  ▇ 2%
  19 [18]  ./lib/clone-a...lone-ast.js)   1ms  ▇ 2%
  20  [8]  ./lib/default...-options.js)   1ms  ▇ 2%
  21 [33]  array-map (array-map)          1ms  ▇ 2%
  22 [21]  array-map (no...ap/index.js)   1ms  ▇ 2%
  23  [1]  date-time (no...me/index.js)   1ms  ▇ 2%
  24 [23]  array-reduce...ce/index.js)    1ms  ▇ 2%
  25  [2]  parse-ms (nod...ms/index.js)   1ms  ▇ 2%
  26  [3]  pretty-ms (no...ms/index.js)   1ms  ▇ 2%
  27 [26]  ./lib/is_argu...rguments.js)   1ms  ▇ 2%
Total require(): 44
Total time: 44ms

Looks like escallmatch is the big offender here. Moving to call-signature should help. If that ends up being unworkable, at least have escallmatch use acorn, so we only require one parser library.