Stream (Best performance):

val largeData: Parcelable = //...
// or
val largeData: Serializable = //...
 
// send    
Intent().apply {
    setComponent(ComponentName(APP_PACKAGE_NAME, ACTIVITY_PACKAGE_NAME))
    putExtra(LARGE_DATA_STREAM, largeData.parcelableInputStream())
}

// receive
intent.getParcelableExtra<ParcelableInputStream<Parcelable>>(LARGE_DATA_STREAM)?.read()

Slice (Worst performance):

val largeData: Parcelable = //...
// or
val largeData: Serializable = //...
 
// send    
Intent().apply {
    setComponent(ComponentName(APP_PACKAGE_NAME, ACTIVITY_PACKAGE_NAME))
    putExtra(LARGE_DATA_SLICE, largeData.parcelableSlice())
}

// receive
intent.getParcelableExtra<ParcelableSlice<Parcelable>>(LARGE_DATA_SLICE)?.join()

Pipe (Be careful about process lifecycle):

val largeData: Parcelable = //...
// or
val largeData: Serializable = //...

val (reader, writer) = ParcelableStreamPipe<Parcelable>()

// send
Thread {
  writer.write(largeData)
}.start()
    
Intent().apply {
    setComponent(ComponentName(APP_PACKAGE_NAME, ACTIVITY_PACKAGE_NAME))
    putExtra(LARGE_DATA_PIPE, reader)
}

// receive
Thread {
  intent.getParcelableExtra<ParcelableInputStream<Parcelable>>(LARGE_DATA_PIPE)?.read()
}.start()

Other usages

Send ParcelFileDescriptor via intent:

val descriptor: ParcelFileDescriptor = // ...

Intent().apply {
    setComponent(ComponentName(APP_PACKAGE_NAME, ACTIVITY_PACKAGE_NAME))
    putExtra(PARCELED_DESCRIPTOR, ParceledFileDescriptor(descriptor))
}

intent.getParcelableExtra<ParceledFileDescriptor>(PARCELED_DESCRIPTOR)?.descriptor

Send List<Parcelable> via intent:

val list: List<Parcelable> = // ...

Intent().apply {
    setComponent(ComponentName(APP_PACKAGE_NAME, ACTIVITY_PACKAGE_NAME))
    putExtra(PARCELED_LIST, ParceledList(descriptor))
}

intent.getParcelableExtra<ParceledList<Parcelable>>(PARCELED_LIST)?.list

How to add dependencies

dependencyResolutionManagement {
    repositories {
        maven("https://jitpack.io")
    }
}

dependencies {
    implementation("com.github.0xera.parcelable:stream:0.1.1")
    implementation("com.github.0xera.parcelable:slice:0.1.1")
}