I've been reading the source code of Compose and found that in the

rxjava2

package the

subscribeAsState

function calls

asState

and it uses the

onPreCommit

hook. Why would the

onCommit

hook not work there? I don't really understand the use case of

onPreCommit

.

The distinction is probably going away soon. The difference is that

onCommit

posts the event to happen "a bit later" rather than as we're actually applying the changes to the composition. The direction we're leaning in is that the current deferred

onCommit

behavior will go away and only the

onPreCommit

behavior will remain.

Oh, okay. So the reason they were made separate was not to overwhelm compose with not as crucial events (and put those in

onCommit

)?

no, the reason they were made separate is partially historical and had to do with whether it was risky or not to execute side effects of a composition while the process of applying them was still in progress, vs. after all of them have been completely applied.

Thanks for the detailed response!