Which libraries have you looked at? <a href="https:&#x2F;&#x2F;github.com&#x2F;pquerna&#x2F;ffjson" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;pquerna&#x2F;ffjson</a> and <a href="https:&#x2F;&#x2F;github.com&#x2F;benbjohnson&#x2F;megajson" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;benbjohnson&#x2F;megajson</a> claim to be faster