Serpyco benchmarks

From https://github.com/voidfiles/python-serialization-benchmark:

Library

Many Objects (seconds)

One Object (seconds)

Relative

Serpyco

0.00618839

0.00304437

1

Custom

0.00659513

0.0038712

1.13361

lima

0.00792766

0.00405002

1.2973

serpy

0.0237653

0.0117433

3.84594

Strainer

0.0360789

0.0200641

6.08085

Toasted Marshmallow

0.0430918

0.023999

7.2666

Colander

0.136315

0.0678208

22.11

Lollipop

0.214421

0.102774

34.3554

Marshmallow

0.305463

0.157168

50.1075

kim

0.38243

0.195495

62.595

Django REST Framework

0.470731

0.328495

86.5641

Ran on a Intel Core i5-6500 CPU, Python 3.7.1 on Debian Stretch.