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digitalmars.D.learn - Performance issue with GC

reply Yuxuan Shui <yshuiv7 gmail.com> writes:
I have a little data processing program which makes heavy use of 
associative arrays, and GC almost doubles the runtime of it (~2m 
with GC disabled -> ~4m).

I just want to ask what's the best practice in this situation? Do 
I just use GC.disable and manually run GC.collect periodically?
Sep 07 2016
parent reply Basile B. <b2.temp gmx.com> writes:
On Wednesday, 7 September 2016 at 21:20:30 UTC, Yuxuan Shui wrote:

 I have a little data processing program which makes heavy use 
 of associative arrays, and GC almost doubles the runtime of it 
 (~2m with GC disabled -> ~4m).

 I just want to ask what's the best practice in this situation? 
 Do I just use GC.disable and manually run GC.collect 
 periodically?


I'd say yes.

Another option: https://github.com/economicmodeling/containers. 
The HashMap will give you a full control on the mem allocs.
Sep 07 2016
parent Yuxuan Shui <yshuiv7 gmail.com> writes:
On Wednesday, 7 September 2016 at 22:54:14 UTC, Basile B. wrote:

 On Wednesday, 7 September 2016 at 21:20:30 UTC, Yuxuan Shui 
 wrote:

 I have a little data processing program which makes heavy use 
 of associative arrays, and GC almost doubles the runtime of it 
 (~2m with GC disabled -> ~4m).

 I just want to ask what's the best practice in this situation? 
 Do I just use GC.disable and manually run GC.collect 
 periodically?


 I'd say yes.

 Another option: https://github.com/economicmodeling/containers. 
 The HashMap will give you a full control on the mem allocs.


This is a really nice library! Thanks a lot.
Sep 07 2016