Thread safety issue (I think) with defaultdict

[Rhodri James]

On 02/11/17 20:24, Chris Angelico wrote:
> Thank you. I've had this argument with many people, smart people (like
> Steven), people who haven't grokked that all concurrency has costs -
> that threads aren't magically more dangerous than other options.

I'm with Steven.  To be fair, the danger with threads is that most 
people don't understand thread-safety, and in particular don't 
understand either that they have a responsibility to ensure that shared 
data access is done properly or what the cost of that is.  I've seen far 
too much thread-based code over the years that would have been markedly 
less buggy and not much slower if it had been written sequentially.

-- 
Rhodri James *-* Kynesim Ltd