#pattern framesize, memory

/abcd/
    abcd\=memory
    abcd\=find_limits

/(((((((((((((((((((((((((((((( (^abc|xyz){1,20}$  ))))))))))))))))))))))))))))))/x
    abcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcX\=memory
    abcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcabcX\=find_limits

/ab(cd)/
    abcd\=memory
    abcd\=memory,ovector=0