tcoder

Extreme sampling bias.

Startup has opening -> Can't fill it with people in their network -> Can't fill it with people who come to them -> Resorts to Angel List posting -> Angel list posting stays online longer because they have trouble filling it -> high turnover means the job ad stays up forever or keeps getting reposted.

Great jobs tend to skew toward the left side of that funnel = sampling bias.

Namedtuple CPU-speed performance for some common operations is TERRIBLE compared to dictionaries, at least on 2.7. Orders of magnitude difference. So bad that it really matters. It's shocking how bad the implementors got this.