Slow loading times

[sebamarynissen]

When loading the library using

require('pdkit');

the loading is horribly slow. I always get load times of about 500ms. Given that node's require is synchronous, this means 500ms of blocking.

I found out that the slow load times are being caused by the fontkit dependency. I propose to fix it by only requiring fontkit "on the fly", so

class PDFFont
  @open: (document, src, family, id) ->

    # Only require fontkit when we absolutely need it.
    fontkit = require 'fontkit'
    if typeof src is 'string'
      if StandardFont.isStandardFont src
        return new StandardFont document, src, id
      font = fontkit.openSync src, family
    else if Buffer.isBuffer(src)
      font = fontkit.create src, family
    else if src instanceof Uint8Array
      font = fontkit.create new Buffer(src), family
    else if src instanceof ArrayBuffer
      font = fontkit.create new Buffer(new Uint8Array(src)), family

instead of

fontkit = require 'fontkit'
class PDFFont
  @open: (document, src, family, id) ->
    if typeof src is 'string'
      if StandardFont.isStandardFont src
        return new StandardFont document, src, id
      font = fontkit.openSync src, family
    else if Buffer.isBuffer(src)
      font = fontkit.create src, family
    else if src instanceof Uint8Array
      font = fontkit.create new Buffer(src), family
    else if src instanceof ArrayBuffer
      font = fontkit.create new Buffer(new Uint8Array(src)), family

I tested it and it solves my issue. Going to file a pull-request for this.

[jimmywarting]

maybe updating fontkit to v2 will speed things up, the deep-equal pkg is insanely large. it got replaced with fast-deep-equal