By a simple count across my three active periods since the introduction of the merit system, it took a total of not more than 310 days’ worth of real activity to achieve this:
Wow! This is first word that crossed my mind. Nullius, your merit-magnet skill is outstanding. But it is great ro see that your contributions to the forum and to spread Satoshi's words are well appreciated. I am happy to see myself as
your top merit fan! Congratulations for reaching this rare milestons and congrats again for reaching it in such a small amount of time!
Your bragging is not unfounded. I remember in early 2018 you earned hundreds of merit in a couple of months
Actually, he earned the merits for being hero in just 1 month

This is a performance unseen so far and I am almost sure that we'll never see again:
Starting with 17 merits awarded to some of my old Jr. Member posts by people who remember them, I reached the Hero threshold of 500 merits within 27 days, 8 hours, 16 minutes, 22 seconds of active posting. All in all, from the moment that theymos announced the merit system, it took me 32 days, 9 hours, 14 minutes, 51 seconds to go from zero to Hero