D enters Tiobe top 20

[Ola Fosheim Grøstad]

On Tuesday, 10 December 2019 at 10:04:17 UTC, Martin Tschierschke 
wrote:
> https://www.tiobe.com/tiobe-index/d/
>
> Any comment on this curve?
> Is it possible to match certain events to this shape?

Yes, changes to Google's filtering mechanism and possibly that 
they added new languages.
TIOBE only count the number of pages search engines return at any 
given time. It is not like people suddenly delete all their web 
pages...

A quick drop reflect something mechanical, it is not measuring 
what people do.

Google changes frequently (many times a year). Like you can 
suddenly loose over 50% of your indexed pages because Google 
start to classify them as covering the same content. Or they 
change their static quality scoring of pages. And this propagates 
very slowly throughout their system as it takes time for them to 
crawl the entire web.

A language like Java that is frequently mentioned as the "java 
programming language" by mainstream news agencies throughout the 
world will get more pages with high static quality score spread 
on many sites, so more likely to be shown and thus generates more 
hits.

Google is not evaluated on the number of page it returns for a 
query term, but on the relevance of the first few pages of query 
results.  E.g.:

https://en.wikipedia.org/wiki/Discounted_cumulative_gain