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kotlinlang

when running this (<https://pl.kotl.in/AcLXICVsf>) I would have assumed that doing the context switch would make it run slower. however, it seems to have no effect on the runtime. is this a bad test or am i just misunderstanding how these work

with the monotonic `nanoTime`, I'm certainly seeing a small difference: <https://pl.kotl.in/FHT6gAZLn>

Switching between `.IO` and `.Default` dispatcher is implemented very efficiently and often doesn’t even change the thread.

see <https://kotlin.github.io/kotlinx.coroutines/kotlinx-coroutines-core/kotlinx.coroutines/-dispatchers/-i-o.html>

okay, so this is just because i chose those two threads that there isn't a difference?

Switching between `Main` and `Default`/`IO` should look differently.

so like if I did `.Main` for `deserializeWithContext` (on android) I would see a noticeable difference

I don’t know though whether it would be “noticeable” :slightly_smiling_face:
After all switching context doesn’t mean spinning up a new thread all the time. It merely passes executions between threads and tries to do so as efficiently as possible.