SupportDispatcher
constructor(main: CoroutineDispatcher = Dispatchers.Main, computation: CoroutineDispatcher = Dispatchers.Default, io: CoroutineDispatcher = Dispatchers.IO, confined: CoroutineDispatcher = newSingleThreadContext("ConfinedContext"))
Parameters
main
Context that is confined to the Main thread operating with UI objects
computation
Context that is used by all standard builders, It is backed by a shared pool of threads on JVM. By default, the maximal level of parallelism used by this dispatcher is equal to the number of CPU cores, but is at least two.
io
Context that is designed for offloading blocking IO tasks to a shared pool of threads.
confined
Context that is confined to a single thread