The HTTPX::Timers class mimicks the same top-level API as its
predecessors, but simplifies its implementation. Adding a timer will
resort all timers, while lookups are roughly the same complexity. The
key difference is that callbacks are now aggregated by interval, i.e.
different requests setting the same timeout, will reuse the same timer.
This is a more simple design than Timers::Group, which stores timers in
a binary search tree; the latter will perform well in any environment,
whereas the first one is more tailored for the use-case of httpx, where
most of the times no timers will be set, and when they do, the same
timer will be reused for all requests because they usually have the same
set of options (and therefore timeouts).
This logic was extracted from the vanilla httpx build to a plugin to
make the gem "leaner", by removing "http_form_data" as a hard
dependency.
The multipart plugin still requires one to install it though, but if you
don't need to upload files, you don't have to install the gem anymore
