On Thursday, 9 June 2016 at 14:46:12 UTC, tsbockman wrote:
While working on a small PR
(https://github.com/dlang/phobos/pull/4420), I noticed that D's
template computation system has horrific memory consumption (as
well as being very slow).
[...]
I run into the same issues with
https://maikklein.github.io/2016/03/01/metaprogramming-typeobject/
I think doing metaprogramming that way is really neat but the
memory consumption if I remember correctly was around 50 times
worse than doing it without "type objects".
Also C++ beat D in every compile time meta programming benchmark
that I have tested.
The only time when D was roughly as fast as C++ was with string
mixins but they are even more memory hungry.
Stuff like filtering odd integers from an AliasSeq of 100k
elements etc. I mostly recreated those benchmarks in D
https://github.com/boostorg/hana/tree/master/benchmark
The only time when D compiled roughly as fast as C++ was with
string mixins and they are even more memory hungry.
