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Nikunj Verma asked a question
{{::getFormatedLocalTime("2017-08-23T07:18:07.124Z", {without_time: true})}}

Reddit's feed algorithm - how can you improve it?

I read about Reddit's feed/recommendation algorithm:  https://medium.com/hacking-and-gonzo/how-reddit-ranking-algorithms-work-ef111e33d0d9

This is how it looks like:

# Rewritten code from /r2/r2/lib/db/_sorts.pyx

from datetime import datetime, timedelta
from math import log

epoch = datetime(1970, 1, 1)

def epoch_seconds(date):
    td = date - epoch
    return td.days * 86400 + td.seconds + (float(td.microseconds) / 1000000)

def score(ups, downs):
    return ups - downs

def hot(ups, downs, date):
    s = score(ups, downs)
    order = log(max(abs(s), 1), 10)
    sign = 1 if s > 0 else -1 if s < 0 else 0
    seconds = epoch_seconds(date) - 1134028003
    return round(sign * order + seconds / 45000, 7)​

Question: Not changing the business rules, are there any improvements you could make to improve the algorithm?

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