> Execution engines themselves should provide ways to preempt execution. Yes, and that preemption occurs at the opcode level. Which is completely defeated if y

> Execution engines themselves should provide ways to preempt execution. Yes, and that preemption occurs at the opcode level. Which is completely defeated if your string matching opcode can hang for an inordinate amount of time because the user supplies a very large string and/or crafts string inputs that force O(n^2) or worse behaviour.