/// <summary>
/// Preallocate memory to avoid the impact to resize arrays when many entities are submitted at once
/// </summary>
void Preallocate(ExclusiveGroupStruct groupID, uint size, IComponentBuilder[] entityComponentsToBuild)
{
void PreallocateEntitiesToAdd()
{
_groupedEntityToAdd.Preallocate(groupID, size, entityComponentsToBuild);
}
void PreallocateDBGroup()
{
var numberOfEntityComponents = entityComponentsToBuild.Length;
FasterDictionary <RefWrapperType, ITypeSafeDictionary> group = GetOrAddDBGroup(groupID);
for (var index = 0; index < numberOfEntityComponents; index++)
{
var entityComponentBuilder = entityComponentsToBuild[index];
var entityComponentType = entityComponentBuilder.GetEntityComponentType();
var refWrapper = new RefWrapperType(entityComponentType);
var dbList = group.GetOrAdd(refWrapper, () => entityComponentBuilder.CreateDictionary(size));
entityComponentBuilder.Preallocate(dbList, size);
if (_groupsPerEntity.TryGetValue(refWrapper, out var groupedGroup) == false)
{
groupedGroup = _groupsPerEntity[refWrapper] =
new FasterDictionary <ExclusiveGroupStruct, ITypeSafeDictionary>();
}
groupedGroup[groupID] = dbList;
}
}
PreallocateDBGroup();
PreallocateEntitiesToAdd();
_entityLocator.PreallocateReferenceMaps(groupID, size);
}
static void BuildEntity
(EGID entityID, FasterDictionary <RefWrapperType, ITypeSafeDictionary> group
, IComponentBuilder componentBuilder, IEnumerable <object> implementors)
{
var entityComponentType = componentBuilder.GetEntityComponentType();
ITypeSafeDictionary safeDictionary = group.GetOrAdd(new RefWrapperType(entityComponentType)
, (ref IComponentBuilder cb) => cb.CreateDictionary(1)
, ref componentBuilder);
// if the safeDictionary hasn't been created yet, it will be created inside this method.
componentBuilder.BuildEntityAndAddToList(safeDictionary, entityID, implementors);
}