Mainly looking at using this for signing HTTP(S) requests, as a replacements for HMAC-SHA256, which requires symmetric keys.
Note, we want to this work in browser, python and node. But we only really care about performance in node. Clients that sign request, usually don't make hundreds of these per second. And python servers are slow anyways :)
So if it's fast server side on node, when deployed correctly (ie. without