Why are globals set to tls by default? and why is fast code ugly by default?

[Nick Treleaven]

On Sunday, 26 March 2023 at 20:39:21 UTC, ryuukk_ wrote:
> if my code doesn't do threads, why should i put my variable 
> into TLS?

I don't think writing __gshared is much of a burden. You can use 
-vtls to print out all variables that are TLS, and add that to an 
automated test to check you don't have any accidentally. I have 
thought before that a --no-threads compiler switch that does not 
link the key thread functions but makes __gshared the default 
might be a good enhancement for your use case. Then if you 
accidentally call some code that uses std.parallelism internally 
you would get a link error.

> If i want fast code, why should i make use of ugly syntax?

1. If you want fast code, why aren't you using threads?
2. By default D supports threads and accidental data races are 
far worse than ugly syntax.