How to make a slow compile

[Monkyyy]

On Thursday, 21 August 2025 at 05:38:08 UTC, evilrat wrote:
> On Wednesday, 20 August 2025 at 15:33:45 UTC, monkyyy wrote:
>> once again dconf contains people who talk about compile speed 
>> as if it can be slow
>>
>> What are they doing? Even my worse compile time abstraction 
>> was O(n^2) or maybe some awful string concatenation of an 
>> entire file; still effectively instant
>>
>> Wheres a 1000 line file that does something meta programmingly 
>> useful that takes 5 minutes?
>>
>> Do they lose track of what the compiler is even doing? Do they 
>> turn off the template recursion depth limit?
>
> I have godot-dlang builds (with dub/LDC) compiling for about 3 
> minutes on top hardware. But this is more of a config issues 
> and how LDC handles all that code symbols(functions, etc...), 
> having to build a spaghetti templates for over 1k classes is no 
> joke. This is something i am planning to look into, having a 
> tiny WASM game scripts for 30 Mb shared library is no fun. This 
> is mainly because it uses dub import-paths AND source-paths 
> together for usability simplicity reasons. Would be much faster 
> to remove source-paths and properly configure D's -i include 
> pattern, that requires figuring dub configuration that properly 
> uses predefined env variables.

> spaghetti template

Can you post what you believe is slow?

Can dub cause 3 minute compiles, I would've thought it would O() 
based on file count (reading json badily into concat a 
unnesserily complex compile commmand) is dub some how worse then 
I thought possible?