On Wednesday, 24 January 2018 at 21:47:26 UTC, H. S. Teoh wrote:
On Wed, Jan 24, 2018 at 09:48:21PM +0000, Nordlöw via
Digitalmars-d-learn wrote:
Why is the memory overhead for a class instance as high as 3
words (24 bytes on 64-bit systems? I find that annoyingly much
for my knowledge database application.
[...]
There's been an attempt to get rid of the Monitor field, which
takes up one word, but it didn't seem to have gone anywhere the
last time it was discussed. I believe originally it was always
initialized, but lately it seems to have been changed to be
lazily initialized, so at least you'll only incur the
computational cost if you actually use it. Nevertheless, the
field itself is still there.
T
Can I use `*(cast(size_t*)&c.__monitor)` for storing my own stuff
in a class instance `c` if I never use monitors? :)
BTW: the documentation on the concept of monitors is kind of
sparse here
https://dlang.org/spec/class.html#class_properties
What is the `__monitor` property used for? Something with
synchronized member functions?
