It appears that:

ucb/source/ucp/webdav-curl/SerfLockStore.cxx

Hasa  thread that wakes up 25 times per second:

        std::this_thread::sleep_for( std::chrono::milliseconds(1000/25) );

to see if some timeouts have expired.

However - the method 'refreshLocks' could easily tell us how long it will be until we need to refresh another lock; and if we wait/sleep on a condition we can signal that if new ones are added.

This would make scheduling far more relaxed.

Suggest adding a shortest deadline in milliseconds to wake up again as a return value from 'refreshLocks()' there and sleeping that long.

=)