Also, did you read the rest of the post? Typical test cycles are much faster than that. But a full test of the entire system takes some time. As it should.
This is also why the test suite for git takes a long time, but has a very good signal to noise ratio.
If only that "unnecessary code" had tests... Oh wait.
Not to mention you have increased the workload of everyone just to mitigate the impact of additional code. Let me know how that works out for you. :)
Seriously, straw men not withstanding, this thread is specifically about tested code where a complaint was raised about how long the tests take. And the "how long" was only 4 friggin minutes for a full suite, or 4 seconds for a module.