We cut Node.js' memory in half (so you don't have to)

V8's pointer compression feature reduces JavaScript heap memory usage by 50% by storing 32-bit offsets instead of 64-bit pointers. Previously unusable in Node.js due to a 4GB shared memory limitation, Cloudflare and Igalia's new IsolateGroups feature gives each worker thread its own 4GB cage. Production benchmarks show only 2-4% latency overhead while improving P99 performance by 7%.