It's absolutely possible (though not necessarily easy) to write constant-time code on a modern machine and OS. In cryptography, "constant-time" does not mean th

It's absolutely possible (though not necessarily easy) to write constant-time code on a modern machine and OS. In cryptography, "constant-time" does not mean the code literally takes the same amount of time, it's a technically term which a clear technical definition, "code that does not leak secret information through timing analysis." I didn't invent the terms, argue with cryptographers instead. Furthermore, many cryptography applications run on simple embedded hardware. In these cases, it can literally be "constant-time" code, which is likely where the term originated from. But it's no longer the definition.