DMD Frontend working in WebAssembly

[max haughton]

On Friday, 15 October 2021 at 21:58:29 UTC, Paul Backus wrote:
> On Friday, 15 October 2021 at 15:19:26 UTC, Imperatorn wrote:
>>
>> Btw, why is dmd a memory hog?
>
> Because it doesn't free memory. It just allocates, and relies 
> on the OS to clean up at process exit.
>
> See https://www.digitalmars.com/articles/b87.html

lowmem actually isn't much better sometimes. There are issues 
with references being held and confusing the GC, also.

You can see this, if you use either massif or enable the GC. The 
peak heap collapses but at not much expense in runtime. Sometimes 
however, the GC makes no difference - I noticed this when 
benchmarking AliasAssign, you'd expect the old assigned-to memory 
to be freed but this doesn't seem to be the case empirically.