Comment by ljm

So if I understand this right, what GitHub did was something like:

    user = get_user_from_valid_email(params[:email])
    send_reset_email(params[:email])
    # instead of
    # send_reset_email(user.email)

?

I've seen this pattern before and the reason is usually something about using the variable in memory as opposed to the function call. Total non-optimisation.