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AddToCollection.md

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Adding to collection without and with specified capacity

Difference between adding to collection without and with specified capacity and to linked list (which doesn't have pre-allocated capacity).

BenchmarkDotNet=v0.13.1, OS=Windows 10.0.19045
Intel Core i7-7820HQ CPU 2.90GHz (Kaby Lake), 1 CPU, 8 logical and 4 physical cores
.NET SDK=7.0.100
  [Host]     : .NET 6.0.11 (6.0.1122.52304), X64 RyuJIT
  DefaultJob : .NET 6.0.11 (6.0.1122.52304), X64 RyuJIT
Method Categories Size Mean Error StdDev Ratio RatioSD Gen 0 Allocated
AddToListWithCapacity List 4 15.45 ns 0.152 ns 0.118 ns 0.66 0.02 0.0172 72 B
AddToList List 4 23.52 ns 0.528 ns 0.518 ns 1.00 0.00 0.0172 72 B
AddToLinkedList List 4 50.69 ns 0.699 ns 0.619 ns 2.15 0.06 0.0554 232 B
AddToDictionaryWithCapacity Dictionary 4 64.44 ns 1.350 ns 1.325 ns 0.61 0.01 0.0650 272 B
AddToDictionary Dictionary 4 105.44 ns 2.173 ns 2.033 ns 1.00 0.00 0.0918 384 B
AddToListWithCapacity List 64 117.64 ns 2.035 ns 1.903 ns 0.57 0.01 0.0744 312 B
AddToList List 64 205.07 ns 2.165 ns 1.920 ns 1.00 0.00 0.1547 648 B
AddToLinkedList List 64 739.82 ns 11.452 ns 11.248 ns 3.60 0.07 0.7439 3,112 B
AddToDictionaryWithCapacity Dictionary 64 587.21 ns 6.938 ns 6.150 ns 0.62 0.01 0.3710 1,552 B
AddToDictionary Dictionary 64 941.35 ns 18.337 ns 17.153 ns 1.00 0.00 0.8125 3,400 B
AddToListWithCapacity List 128 239.40 ns 5.678 ns 16.564 ns 0.77 0.01 0.1354 568 B
AddToList List 128 348.89 ns 5.287 ns 4.128 ns 1.00 0.00 0.2828 1,184 B
AddToLinkedList List 128 1,452.81 ns 18.332 ns 16.251 ns 4.16 0.09 1.4782 6,184 B
AddToDictionaryWithCapacity Dictionary 128 1,132.86 ns 14.956 ns 13.258 ns 0.61 0.01 0.6561 2,752 B
AddToDictionary Dictionary 128 1,844.53 ns 21.461 ns 21.077 ns 1.00 0.00 1.7662 7,392 B