What is the default number of threads created by Dispatchers.Default in Kotlin coroutines?

By default, Dispatchers.Default in Kotlin Coroutines creates a thread pool whose size is equal to the number of available processor cores, but not less than 2.

That is, if the device has 4 cores, the pool will consist of 4 threads; if there is 1 core, at least 2 threads.

This is done to optimize CPU resource utilization when executing parallel tasks, without creating an excessive number of threads, which could lead to reduced performance due to context switching.

Example:

println(Runtime.getRuntime().availableProcessors()) // number of cores
println(Dispatchers.Default.toString())

Thus, Dispatchers.Default adapts to the hardware capabilities of the device.