improve cbor performance

[yusefnapora]

node-cbor is pretty slow 😞, about 20x slower than tinycbor at converting json to cbor.

Improving this probably means using tinycbor or another native code solution, which could go a few different ways:

• write a command line app to pipe json through and get CBOR maps out the other end
  • don't need to mess with FFI
  • need to figure out how to delimit objects in the output
  • IPLD transform needs to be in native code for tag handling
  • could be used by any language (go, etc)
  • can spawn multiple concurrent processes
• write a C addon or use node-ffi to wrap a native cbor lib
  • FFI is tricky, could potentially crash the node process
  • gives us more flexibility (can expose CBOR tags, etc)
  • no IPC overhead, but blocks the JS thread unless we get fancy with async code
• (crazy option) try to compile tinycbor to webassembly and run node with the --expose-wasm flag 😄

[parkan]

Turns out you can optimize pure js enough!