[DarkNova6]

True, but it wouldn’t be unthinkable. Especially if the O(n) algorithm accesses data sequentially and the O(log n) has indirections.

But maybe the author simply made it up.

[corysama]

You are all right. I was wrong. Should not post math just before going to sleep… So, let’s make the same mistake first thing in the morning:

x=20log2(x) at 143

https://www.wolframalpha.com/input?i=x%3D20*log2%28x%29