Start _allocation_batch_size at 32, seems faster

Author: greg7mdp

include/chainbase/chainbase_node_allocator.hpp

@@ -88,7 +88,7 @@ namespace chainbase {
       bip::offset_ptr<list_item>       _freelist{};
       bip::offset_ptr<ss_allocator_t>  _ss_alloc;
       bip::offset_ptr<segment_manager> _manager;
-      size_t                           _allocation_batch_size = 4;
+      size_t                           _allocation_batch_size = 32;
       size_t                           _freelist_size = 0;
    };
 

include/chainbase/small_size_allocator.hpp

@@ -90,7 +90,7 @@ class allocator {
    bip::offset_ptr<char>      _block_start;
    bip::offset_ptr<char>      _block_end;
    backing_allocator          _back_alloc;
-   size_t                     _allocation_batch_size = 4;
+   size_t                     _allocation_batch_size = 32;
    size_t                     _freelist_size         = 0;
    size_t                     _num_blocks_allocated  = 0; // number of blocks allocated from boost segment allocator
    mutable std::mutex         _m;