I’ve modified the server and Javascript on languagetool.org to show partial results in case of a timeout, instead of just showing an error message. It looks like this:
This will hopefully be a slightly better user experience for those users running into a timeout (either because the server is overloaded and/or because they check long texts).
Anybody using the API will not see this behavior unless they send a allowIncompleteResults=true parameter. The JSON will then contain information whether the result is incomplete, in which case it’s the client’s responsibility to show a warning.