> My millionth of a second is different than yours, and everyone else’s.

No it isn't.

> I want the transaction to happen as quickly as possible. So does everyone else.

Your monitor refresh is about 16,000 times slower so you aren't going to know.

The only reason you need something faster is because you think you have to compete with other people trading on microseconds.

If matches happened at 1 second intervals you wouldn't have to worry about it at all.