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0033138: [Foundation Classes] - NCollection_IncAllocator- Decrease the default block size

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Set default memory block size for IncAllocator to 12KB to make sure the Low Fragmentation Heap is used for memory allocations on Windows platform.
This commit is contained in:
Eugeny Maltchikov
2022-09-12 11:00:49 +03:00
committed by smoskvin
parent 259b930379
commit 9218d04b9a
2 changed files with 15 additions and 3 deletions
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dox/user_guides/foundation_classes/foundation_classes.md
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@@ -1331,7 +1331,7 @@ Therefore if the user of *NCollection* does not specify any allocator as a param
Nevertheless, it is possible to define a custom *Allocator* type to manage the memory in the most optimal or convenient way for this algorithm.
As one possible choice, the class *NCollection_IncAllocator* is included.
Unlike *NCollection_BaseAllocator*, the memory is allocated in big blocks (about 20kB) and the allocator keeps track of the amount of occupied memory.
Unlike *NCollection_BaseAllocator*, the memory is allocated in big blocks (about 12kB) and the allocator keeps track of the amount of occupied memory.
The method *Allocate* just increments the pointer to non-occupied memory and returns its previous value.
Memory is only released in the destructor of *NCollection_IncAllocator*, the method *Free* is empty.
If used properly, this Allocator can greatly improve the performance of specific algorithms.