What are isolate groups and Dart's newer experimental shared memory capabilities, and how might these genuinely eventually reduce the current overhead of passing genuinely very large amounts of data between two separate isolates?

Traditionally, transferring a genuinely very large amount of data between two separate isolates has required fully serializing and then properly copying that entire data across the strict memory boundary separating them, which can become a genuinely real, measurable performance bottleneck for extremely large datasets, and newer Dart capabilities, including certain specific transferable typed data objects that can efficiently move ownership of a large memory buffer between isolates without needing a full genuine data copy at all, aim to meaningfully reduce this exact same specific overhead for particular specific use cases, such as efficiently and directly passing a genuinely very large raw image buffer between a background processing isolate and the main isolate.

final transferableData = TransferableTypedData.fromList([largeByteBuffer]);
sendPort.send(transferableData);