I'm not necessarily assuming JavaScript in the browser; we could just as easily be talking back-end services written in Node. That said, I'm going to also subm

I'm not necessarily assuming JavaScript in the browser; we could just as easily be talking back-end services written in Node. That said, I'm going to also submit that, if you're shoving big enough messages at a fast enough clip that you feel motivated to be this worried about deserialization speed in the browser, you've also got bigger fish to fry. Either way you cut it, it's at least worth stopping to think about whether you're being penny wise and pound foolish.