Convenient function to perform a concurrent map operation.
options.signal and options.timeout apply to the whole call: when either
triggers, the returned promise rejects immediately and items still waiting
for a permit are not started. Calls to fn that are already running are
not interrupted; they finish in the background and release their permits.
Convenient function to perform a concurrent map operation.
options.signalandoptions.timeoutapply to the whole call: when either triggers, the returned promise rejects immediately and items still waiting for a permit are not started. Calls tofnthat are already running are not interrupted; they finish in the background and release their permits.