In the curl release after the next, there is a nice feature coming for event-based applications: notifications.
Some numbers on possible performance/cpu use improvements in the PR, ymmv.
#curl
github.com/curl/curl/pull/1843…
multi notifications by icing · Pull Request #18432 · curl/curl
An implementation of the discussion #17817, adding a "notification" feature to the multi handle. Notification types INFO_READ and EASY_DONE implemented Notification types expected to gro...GitHub