Re: Haaland, I just saw a statistic where Andy Cole scored 5 through his first 8 matches in 1993 (34 in 42), and Shearer 6 in 1994 (34 in 42). Salah had 4 in 2017, though by then the schedule had been reduced to 38 matches, and he had only 32 goals overall.
Regardless, Haaland has had 14 in 8, and if he could keep that up, he should finish the season with 66 goals in the Premier League!
That's probably unrealistic, but I think that the previous scoring records are under threat anyway.