There are a bunch of different performance differences, but a couple basic differences: 1) gc is per-process, not global/stop-the-world 2) the VM is responsible

There are a bunch of different performance differences, but a couple basic differences: 1) gc is per-process, not global/stop-the-world 2) the VM is responsible for scheduling processes using threads, and can pre-empt...blocking the scheduler is considered a VM bug.