Efficient way of batch spawning a large number of tasks #91
Description
Bevy's use of async_executor tends to be very bursty, with a single thread that adds tens or hundreds of tasks in short bursts. This might be running up against the executor's need to acquire a lock on the internal state for every task that is spawned or terminated. Is it possile to expose an function on Executor that would allow the caller to grab the lock once and the spawn an arbitrary number of tasks before releasing it?