Preface: these are the questions of a CS student, not attacks. What about java/.net/regex engines? Is it required that they exist outside the browser, or are p

Preface: these are the questions of a CS student, not attacks. What about java/.net/regex engines? Is it required that they exist outside the browser, or are performance limited to interpreting, or is there a better solution? What's the problem with the control flow of assembly?