Remove default use of SimpleAsyncTaskExecutor in WebSocketClient implementations [SPR-11580] #16204
Description
Rossen Stoyanchev opened SPR-11580 and commented
Currently WebSocketClient implementations use a SimpleAsyncTaskExecutor by default to avoid blocking when connecting.
Not using any executor is arguably a better default for the case where a large number of connections are made. If connections are opened quickly, the difference probably won't be noticed, or if they're slow it leads to a realization that a task executor can be configured.
By contrast a SimpleAsyncTaskExecutor leads to thread creation, a more subtle effect that is harder to realize.
Affects: 4.0.2
Referenced from: commits 9552c82