Benchmark

We may integrate or contribute back benchmarks currently located in Lumino (see jupyterlab/rtc#57):

• https://github.com/jupyterlab/lumino/pull/78

• https://github.com/jupyterlab/lumino/tree/8726968af142e44ca61ba28ab5f9f6911f34ee3f/datastore-benchmarks

The initial source of those benchmarks:

• https://github.com/dmonad/crdt-benchmarks

• https://github.com/automerge/automerge/pull/253#issuecomment-638291412