Server stalls on Autosave of large annotation data

[joakimlindblad]

For larger Annotation data, > 5000 markers

In extendHistory()
if (diff.diffJson(JSON.parse(data), JSON.parse(oldData)).length === 1)
seems like an extremely slow way to check if data has changed

Can we not just have a counter, or a checksum, or something?

[joakimlindblad]

And, also, diff.createPatch stalls; should/can we use Google's diff-match-patch instead?
See: kpdecker/jsdiff#239

[joakimlindblad]

See also https://github.com/justsml/json-diff-performance

[joakimlindblad]

Resolved by PR #217