module Zeitwerk::ExplicitNamespace

def disable_tracer_if_unneeded
synchronize do
er.disable if cpaths.empty?

def register(cpath, loader)
ynchronize do
s[cpath] = loader
check enabled? because, looking at the C source code, enabling an
bled tracer does not seem to be a simple no-op.
r.enable unless tracer.enabled?

def registered?(cpath)
key?(cpath)

def tracepoint_class_callback(event)
he class is a singleton class, we won't do anything with it so we
bail out immediately. This is several orders of magnitude faster
 accessing its name.
 if event.self.singleton_class?
ight be tempting to return if name.nil?, to avoid the computation
 hash code and delete call. But Ruby does not trigger the :class
t on Class.new or Module.new, so that would incur in an extra call
nothing.
he other hand, if we were called, cpaths is not empty. Otherwise
tracer is disabled. So we do need to go ahead with the hash code
utation and delete call.
der = cpaths.delete(real_mod_name(event.self))
er.on_namespace_loaded(event.self)
ble_tracer_if_unneeded

def unregister_loader(loader)
delete_if { |_cpath, l| l == loader }
_tracer_if_unneeded