🔒 9 harder puzzles locked — reach 🥷 Console Cadet to unlock.
01// Hit from 64 threads, ~10M times/sec02▢ ▢ ▢ ▢03int v = counter.incrementAndGet();
AtomicInteger counter = new AtomicInteger();
int counter = 0; synchronized(this) { counter++; }
volatile int counter = 0;