Terrible performance

[DanialLiu]

I use kotlin 1.3.50 and coroutines 1.3.1 on android
this is my simple code

GlobalScope.launch{
            while(true){
                Log.i("tag", "default dispatchers")
                delay(1000)
            }
        }

CPU usage:

CPU usage will raise up to 30% every second

If I change delay(1000) to delay(10)
Every DefaultDispatch thread will cost more than 40% each CPU core
As the result of profile tool, most CPU waste in findTask

Why the performance is so terrible?

[qwwdfsad]

It's a known issue #1046 which fix is targeted to 1.3.2.
Closing as duplicate