Check out the docs branch for detailed explanations. This exhibits a loop hole in the Rust compiler allowing to break lifetime inference... and from there all the usual guarantees go through the window.

Interesting study, the amount of bugs which could have been prevented by the introduction of static typing in Javascript code bases is definitely impressive (15% is not a small amount in my opinion).

Nice trick to get the pressure off the team while it looks for a proper solution.

Interesting subtle differences between gzip and Python expectations which leads to a tough integration bug to find.

What's worse than a compiler bug? A processor one... very interesting deep dive in this particularly nasty one.

It's been a while since I dived into reading a Ph.D thesis... I bumped into that one through an article which was trying to summarize it but I wasn't super happy with it. That's why I decided to go to the source.

It's an interesting read, it has the benefit of making a clear difference between complicated and complex from the get go, which is welcome (generally a good sign for me).
If you want the tl;dr it's at the end of page 16:
"we found that differences in architectural complexity accounted for differences in developer productivity of 50%, three-fold differences in defect density, and order-of-magnitude differences in staff turnover".

Note the last point about the staff turnover should be taken with a grain of salt though. It is well explained in the limitations of the study, being a lot in the high complexity areas of the code can also be a sign of higher skills and thus more job opportunities.

Anyway, I think we all suspected some link between complexity and productivity but I always wondered how much. Seeing how the study was done it's definitely not an absolute answer (very thorough and precise, even historical data taken into account over several releases... but in a single company). Still the value is in at last giving us some rough numbers on how far the impacts can go. Thus, the scale of those impacts are potentially huge.

Maybe it's time to stop trying to find rockstar developers or mythical 10x developers (common "leprechauns" of our industry)... Let's focus on tackling undue or uncontrolled architectural and code complexity instead, shall we? Even better if that's done through the use of documented patterns when applicable.

Interestingly, the literature review part gives a few clues about why there is under-investment in architecture in general, or reworking the architecture on long term project. It's unclear to organizations the costs of the undue complexity will carry. It's exactly what this thesis tries to shed light on (see tl;dr above).

Also, it's interesting to see confirmed that the perception of the architectural complexity we have is often wrong when looking at parts in isolation. The relationships need to be transitively mapped to start to grasp the presence of architectural complexity. That's why only coordinated efforts can tackle it, it's almost impossible to tackle for a single developer.

Of course I'd advise reading it in full, that requires investing some time into it though.

Very stimulating, I'd like to apply some of those tools on projects in the wild but I'm not sure there are ready made tools available. Also I'm wondering what we would find if I'd reuse some of those in ComDaAn to work on temporality of changes rather than dependencies. I think this could give interesting insights.

Definitely a case of a very interesting bug found in production. In the end, the root cause is the loss of context because people working on the components changed. Never underestimate the knowledge lost when someone leaves.

Discusions around a fascinating and very important class of errors in distributed systems.

Now that is indeed an interesting bug. Time can be a fickle friend... arithmetic as well.

Interesting exploration for a low level bug in the TCP stack. A proof that it's not always the network being at fault. ;-)