Naive node.js faster than naive LDC2?

Andrei Alexandrescu SeeWebsiteForEmail at erdani.org
Sat Aug 22 19:20:34 UTC 2020


On 8/22/20 1:40 PM, kinke wrote:
> On Saturday, 22 August 2020 at 16:15:14 UTC, H. S. Teoh wrote:
>> 3) std.math.fmax calling the C library (involving a PIC indirection to a
>> shared library as opposed to inlineable native D code).
> 
> Yes, and that's because there's only a `real` version for fmax.
>
> If 
> upstream Phobos had proper double/float overloads, we could uncomment 
> the LDC-specific implementations using LLVM intrinsics, which use 
> (obviously much faster) SSE instructions:
> 
> https://github.com/ldc-developers/phobos/blob/1366c7d5be65def916f030785fc1f1833342497d/std/math.d#L7785-L7798 
> 
> 
> Number crunching in D could be significantly accelerated if the people 
> interested in it showed some love for std.math, but we've had this topic 
> for years.

Ow, do we still suffer from that? Sigh.

https://github.com/dlang/phobos/pull/7604/files

It's 10 minutes of work - as much as writing a couple of posts, and much 
more satisfactory.


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