Now all the crypto code in a binary is - easily identifiable and more easily attackable - because of the extra prefix byte, less likely to fit in cache and mo

Now all the crypto code in a binary is - easily identifiable and more easily attackable - because of the extra prefix byte, less likely to fit in cache and more likely to suffer performance and also I can't make existing, well tested crypto code in binary form on critical systems I don't want to update yet run in constant time.