This benchmark compares Get, Set & TryGetValue for different IDictionary<TKey, TValue> implmentations.
The bechmark is not multi threaded.
| Method | key | itemCount | keyExists | Mean | Error | StdDev | type | operation | Gen 0 | Gen 1 | Gen 2 | Allocated |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ConcurrentDictionaryTryGetValue | 0 | 0 | False | 21.895 ns | 0.4538 ns | 0.4855 ns | ConcurrentDictionary | TryGetValue | - | - | - | - |
| ConcurrentDictionaryTryGetValue | 0 | 5 | False | 21.194 ns | 0.4373 ns | 0.4295 ns | ConcurrentDictionary | TryGetValue | - | - | - | - |
| ConcurrentDictionaryGet | 0 | 5 | True | 29.900 ns | 0.5505 ns | 0.4880 ns | ConcurrentDictionary | Get | - | - | - | - |
| ConcurrentDictionarySet | 0 | 5 | True | 67.930 ns | 1.3995 ns | 1.4975 ns | ConcurrentDictionary | Set | - | - | - | - |
| ConcurrentDictionaryTryGetValue | 0 | 5 | True | 28.558 ns | 0.5894 ns | 0.5513 ns | ConcurrentDictionary | TryGetValue | - | - | - | - |
| ConcurrentDictionaryTryGetValue | 0 | 10 | False | 20.796 ns | 0.4537 ns | 0.5572 ns | ConcurrentDictionary | TryGetValue | - | - | - | - |
| ConcurrentDictionaryGet | 0 | 10 | True | 30.507 ns | 0.5576 ns | 0.7633 ns | ConcurrentDictionary | Get | - | - | - | - |
| ConcurrentDictionarySet | 0 | 10 | True | 69.281 ns | 1.3695 ns | 1.3451 ns | ConcurrentDictionary | Set | - | - | - | - |
| ConcurrentDictionaryTryGetValue | 0 | 10 | True | 28.071 ns | 0.5274 ns | 0.4934 ns | ConcurrentDictionary | TryGetValue | - | - | - | - |
| ConcurrentDictionaryTryGetValue | 0 | 20 | False | 20.608 ns | 0.4325 ns | 0.4248 ns | ConcurrentDictionary | TryGetValue | - | - | - | - |
| ConcurrentDictionaryGet | 0 | 20 | True | 30.945 ns | 0.7238 ns | 0.8045 ns | ConcurrentDictionary | Get | - | - | - | - |
| ConcurrentDictionarySet | 0 | 20 | True | 65.549 ns | 0.9800 ns | 0.8687 ns | ConcurrentDictionary | Set | - | - | - | - |
| ConcurrentDictionaryTryGetValue | 0 | 20 | True | 28.262 ns | 0.6017 ns | 0.6929 ns | ConcurrentDictionary | TryGetValue | - | - | - | - |
| ConcurrentDictionaryTryGetValue | 0 | 50 | False | 20.862 ns | 0.4595 ns | 0.4719 ns | ConcurrentDictionary | TryGetValue | - | - | - | - |
| ConcurrentDictionaryGet | 0 | 50 | True | 29.599 ns | 0.6653 ns | 0.7662 ns | ConcurrentDictionary | Get | - | - | - | - |
| ConcurrentDictionarySet | 0 | 50 | True | 66.769 ns | 1.3338 ns | 1.5878 ns | ConcurrentDictionary | Set | - | - | - | - |
| ConcurrentDictionaryTryGetValue | 0 | 50 | True | 28.863 ns | 0.4733 ns | 0.4196 ns | ConcurrentDictionary | TryGetValue | - | - | - | - |
| ConcurrentDictionaryTryGetValue | 0 | 100 | False | 20.195 ns | 0.2925 ns | 0.2736 ns | ConcurrentDictionary | TryGetValue | - | - | - | - |
| ConcurrentDictionaryGet | 0 | 100 | True | 28.549 ns | 0.5862 ns | 0.5483 ns | ConcurrentDictionary | Get | - | - | - | - |
| ConcurrentDictionarySet | 0 | 100 | True | 69.575 ns | 1.3875 ns | 1.2979 ns | ConcurrentDictionary | Set | - | - | - | - |
| ConcurrentDictionaryTryGetValue | 0 | 100 | True | 29.988 ns | 0.6434 ns | 1.0206 ns | ConcurrentDictionary | TryGetValue | - | - | - | - |
| ConcurrentDictionaryTryGetValue | 19 | 20 | False | 23.039 ns | 0.3287 ns | 0.3075 ns | ConcurrentDictionary | TryGetValue | - | - | - | - |
| ConcurrentDictionaryGet | 19 | 20 | True | 35.654 ns | 0.3242 ns | 0.3032 ns | ConcurrentDictionary | Get | - | - | - | - |
| ConcurrentDictionarySet | 19 | 20 | True | 75.180 ns | 1.1031 ns | 0.9779 ns | ConcurrentDictionary | Set | - | - | - | - |
| ConcurrentDictionaryTryGetValue | 19 | 20 | True | 35.893 ns | 0.5892 ns | 0.5511 ns | ConcurrentDictionary | TryGetValue | - | - | - | - |
| ConcurrentDictionaryTryGetValue | 2 | 5 | False | 21.194 ns | 0.3314 ns | 0.3100 ns | ConcurrentDictionary | TryGetValue | - | - | - | - |
| ConcurrentDictionaryGet | 2 | 5 | True | 29.914 ns | 0.5227 ns | 0.4890 ns | ConcurrentDictionary | Get | - | - | - | - |
| ConcurrentDictionarySet | 2 | 5 | True | 67.922 ns | 0.9573 ns | 0.8954 ns | ConcurrentDictionary | Set | - | - | - | - |
| ConcurrentDictionaryTryGetValue | 2 | 5 | True | 29.376 ns | 0.3340 ns | 0.3124 ns | ConcurrentDictionary | TryGetValue | - | - | - | - |
| ConcurrentDictionaryTryGetValue | 24 | 50 | False | 22.273 ns | 0.2859 ns | 0.2674 ns | ConcurrentDictionary | TryGetValue | - | - | - | - |
| ConcurrentDictionaryGet | 24 | 50 | True | 35.945 ns | 0.5235 ns | 0.4897 ns | ConcurrentDictionary | Get | - | - | - | - |
| ConcurrentDictionarySet | 24 | 50 | True | 74.090 ns | 1.0004 ns | 0.8868 ns | ConcurrentDictionary | Set | - | - | - | - |
| ConcurrentDictionaryTryGetValue | 24 | 50 | True | 36.910 ns | 0.7850 ns | 0.8062 ns | ConcurrentDictionary | TryGetValue | - | - | - | - |
| ConcurrentDictionaryTryGetValue | 4 | 5 | False | 21.083 ns | 0.3817 ns | 0.3571 ns | ConcurrentDictionary | TryGetValue | - | - | - | - |
| ConcurrentDictionaryGet | 4 | 5 | True | 30.323 ns | 0.6812 ns | 0.6690 ns | ConcurrentDictionary | Get | - | - | - | - |
| ConcurrentDictionarySet | 4 | 5 | True | 68.472 ns | 0.9008 ns | 0.7986 ns | ConcurrentDictionary | Set | - | - | - | - |
| ConcurrentDictionaryTryGetValue | 4 | 5 | True | 29.881 ns | 0.3388 ns | 0.3003 ns | ConcurrentDictionary | TryGetValue | - | - | - | - |
| ConcurrentDictionaryTryGetValue | 4 | 10 | False | 21.286 ns | 0.3420 ns | 0.3199 ns | ConcurrentDictionary | TryGetValue | - | - | - | - |
| ConcurrentDictionaryGet | 4 | 10 | True | 30.233 ns | 0.4429 ns | 0.4143 ns | ConcurrentDictionary | Get | - | - | - | - |
| ConcurrentDictionarySet | 4 | 10 | True | 68.658 ns | 1.3215 ns | 1.2362 ns | ConcurrentDictionary | Set | - | - | - | - |
| ConcurrentDictionaryTryGetValue | 4 | 10 | True | 29.308 ns | 0.5498 ns | 0.5143 ns | ConcurrentDictionary | TryGetValue | - | - | - | - |
| ConcurrentDictionaryTryGetValue | 49 | 50 | False | 21.784 ns | 0.2897 ns | 0.2710 ns | ConcurrentDictionary | TryGetValue | - | - | - | - |
| ConcurrentDictionaryGet | 49 | 50 | True | 36.656 ns | 0.5579 ns | 0.5219 ns | ConcurrentDictionary | Get | - | - | - | - |
| ConcurrentDictionarySet | 49 | 50 | True | 74.163 ns | 1.0755 ns | 1.0061 ns | ConcurrentDictionary | Set | - | - | - | - |
| ConcurrentDictionaryTryGetValue | 49 | 50 | True | 36.654 ns | 0.7481 ns | 0.6998 ns | ConcurrentDictionary | TryGetValue | - | - | - | - |
| ConcurrentDictionaryTryGetValue | 49 | 100 | False | 21.909 ns | 0.2532 ns | 0.2369 ns | ConcurrentDictionary | TryGetValue | - | - | - | - |
| ConcurrentDictionaryGet | 49 | 100 | True | 36.211 ns | 0.6972 ns | 0.6522 ns | ConcurrentDictionary | Get | - | - | - | - |
| ConcurrentDictionarySet | 49 | 100 | True | 74.790 ns | 1.3836 ns | 1.2265 ns | ConcurrentDictionary | Set | - | - | - | - |
| ConcurrentDictionaryTryGetValue | 49 | 100 | True | 36.087 ns | 0.7648 ns | 0.7154 ns | ConcurrentDictionary | TryGetValue | - | - | - | - |
| ConcurrentDictionaryTryGetValue | 9 | 10 | False | 21.638 ns | 0.2727 ns | 0.2417 ns | ConcurrentDictionary | TryGetValue | - | - | - | - |
| ConcurrentDictionaryGet | 9 | 10 | True | 29.521 ns | 0.3530 ns | 0.3302 ns | ConcurrentDictionary | Get | - | - | - | - |
| ConcurrentDictionarySet | 9 | 10 | True | 70.127 ns | 1.4508 ns | 2.7249 ns | ConcurrentDictionary | Set | - | - | - | - |
| ConcurrentDictionaryTryGetValue | 9 | 10 | True | 28.347 ns | 0.5643 ns | 0.5279 ns | ConcurrentDictionary | TryGetValue | - | - | - | - |
| ConcurrentDictionaryTryGetValue | 9 | 20 | False | 20.538 ns | 0.4562 ns | 0.4881 ns | ConcurrentDictionary | TryGetValue | - | - | - | - |
| ConcurrentDictionaryGet | 9 | 20 | True | 29.047 ns | 0.5282 ns | 0.4683 ns | ConcurrentDictionary | Get | - | - | - | - |
| ConcurrentDictionarySet | 9 | 20 | True | 67.345 ns | 1.3698 ns | 1.2813 ns | ConcurrentDictionary | Set | - | - | - | - |
| ConcurrentDictionaryTryGetValue | 9 | 20 | True | 29.009 ns | 0.5097 ns | 0.4768 ns | ConcurrentDictionary | TryGetValue | - | - | - | - |
| ConcurrentDictionaryTryGetValue | 99 | 100 | False | 22.004 ns | 0.4353 ns | 0.4072 ns | ConcurrentDictionary | TryGetValue | - | - | - | - |
| ConcurrentDictionaryGet | 99 | 100 | True | 35.516 ns | 0.6546 ns | 0.6123 ns | ConcurrentDictionary | Get | - | - | - | - |
| ConcurrentDictionarySet | 99 | 100 | True | 73.361 ns | 1.1935 ns | 1.1164 ns | ConcurrentDictionary | Set | - | - | - | - |
| ConcurrentDictionaryTryGetValue | 99 | 100 | True | 35.998 ns | 0.7570 ns | 1.0362 ns | ConcurrentDictionary | TryGetValue | - | - | - | - |
| DictionaryTryGetValue | 0 | 0 | False | 5.470 ns | 0.1139 ns | 0.1009 ns | Dictionary | TryGetValue | - | - | - | - |
| DictionaryTryGetValue | 0 | 5 | False | 22.882 ns | 0.4865 ns | 0.4996 ns | Dictionary | TryGetValue | - | - | - | - |
| DictionaryGet | 0 | 5 | True | 27.054 ns | 0.5292 ns | 0.4950 ns | Dictionary | Get | - | - | - | - |
| DictionarySet | 0 | 5 | True | 34.018 ns | 0.5207 ns | 0.4870 ns | Dictionary | Set | - | - | - | - |
| DictionaryTryGetValue | 0 | 5 | True | 30.745 ns | 0.5678 ns | 0.5312 ns | Dictionary | TryGetValue | - | - | - | - |
| DictionaryTryGetValue | 0 | 10 | False | 16.767 ns | 0.3614 ns | 0.3550 ns | Dictionary | TryGetValue | - | - | - | - |
| DictionaryGet | 0 | 10 | True | 20.390 ns | 0.2856 ns | 0.2532 ns | Dictionary | Get | - | - | - | - |
| DictionarySet | 0 | 10 | True | 23.143 ns | 0.5010 ns | 0.4920 ns | Dictionary | Set | - | - | - | - |
| DictionaryTryGetValue | 0 | 10 | True | 23.096 ns | 0.4012 ns | 0.3753 ns | Dictionary | TryGetValue | - | - | - | - |
| DictionaryTryGetValue | 0 | 20 | False | 16.450 ns | 0.3208 ns | 0.3001 ns | Dictionary | TryGetValue | - | - | - | - |
| DictionaryGet | 0 | 20 | True | 21.177 ns | 0.4381 ns | 0.4098 ns | Dictionary | Get | - | - | - | - |
| DictionarySet | 0 | 20 | True | 23.273 ns | 0.4416 ns | 0.5585 ns | Dictionary | Set | - | - | - | - |
| DictionaryTryGetValue | 0 | 20 | True | 23.302 ns | 0.4834 ns | 0.5373 ns | Dictionary | TryGetValue | - | - | - | - |
| DictionaryTryGetValue | 0 | 50 | False | 17.773 ns | 0.3745 ns | 0.3845 ns | Dictionary | TryGetValue | - | - | - | - |
| DictionaryGet | 0 | 50 | True | 20.661 ns | 0.5189 ns | 0.4854 ns | Dictionary | Get | - | - | - | - |
| DictionarySet | 0 | 50 | True | 22.298 ns | 0.4296 ns | 0.3808 ns | Dictionary | Set | - | - | - | - |
| DictionaryTryGetValue | 0 | 50 | True | 23.811 ns | 0.3777 ns | 0.3533 ns | Dictionary | TryGetValue | - | - | - | - |
| DictionaryTryGetValue | 0 | 100 | False | 16.732 ns | 0.3716 ns | 0.3650 ns | Dictionary | TryGetValue | - | - | - | - |
| DictionaryGet | 0 | 100 | True | 20.066 ns | 0.4945 ns | 0.4857 ns | Dictionary | Get | - | - | - | - |
| DictionarySet | 0 | 100 | True | 23.247 ns | 0.2799 ns | 0.3111 ns | Dictionary | Set | - | - | - | - |
| DictionaryTryGetValue | 0 | 100 | True | 24.118 ns | 0.4641 ns | 0.4341 ns | Dictionary | TryGetValue | - | - | - | - |
| DictionaryTryGetValue | 19 | 20 | False | 16.527 ns | 0.2934 ns | 0.2744 ns | Dictionary | TryGetValue | - | - | - | - |
| DictionaryGet | 19 | 20 | True | 27.395 ns | 0.6511 ns | 0.9943 ns | Dictionary | Get | - | - | - | - |
| DictionarySet | 19 | 20 | True | 32.379 ns | 0.3650 ns | 0.3236 ns | Dictionary | Set | - | - | - | - |
| DictionaryTryGetValue | 19 | 20 | True | 31.100 ns | 0.6693 ns | 1.1365 ns | Dictionary | TryGetValue | - | - | - | - |
| DictionaryTryGetValue | 2 | 5 | False | 22.689 ns | 0.4673 ns | 0.4142 ns | Dictionary | TryGetValue | - | - | - | - |
| DictionaryGet | 2 | 5 | True | 23.309 ns | 0.5531 ns | 0.5173 ns | Dictionary | Get | - | - | - | - |
| DictionarySet | 2 | 5 | True | 29.591 ns | 0.6318 ns | 0.6488 ns | Dictionary | Set | - | - | - | - |
| DictionaryTryGetValue | 2 | 5 | True | 26.403 ns | 0.4657 ns | 0.4356 ns | Dictionary | TryGetValue | - | - | - | - |
| DictionaryTryGetValue | 24 | 50 | False | 16.490 ns | 0.3563 ns | 0.3659 ns | Dictionary | TryGetValue | - | - | - | - |
| DictionaryGet | 24 | 50 | True | 26.871 ns | 0.5406 ns | 0.4793 ns | Dictionary | Get | - | - | - | - |
| DictionarySet | 24 | 50 | True | 31.917 ns | 0.6583 ns | 0.8326 ns | Dictionary | Set | - | - | - | - |
| DictionaryTryGetValue | 24 | 50 | True | 30.994 ns | 0.4607 ns | 0.4084 ns | Dictionary | TryGetValue | - | - | - | - |
| DictionaryTryGetValue | 4 | 5 | False | 22.428 ns | 0.4734 ns | 0.4650 ns | Dictionary | TryGetValue | - | - | - | - |
| DictionaryGet | 4 | 5 | True | 20.243 ns | 0.4757 ns | 0.4449 ns | Dictionary | Get | - | - | - | - |
| DictionarySet | 4 | 5 | True | 22.793 ns | 0.3903 ns | 0.3460 ns | Dictionary | Set | - | - | - | - |
| DictionaryTryGetValue | 4 | 5 | True | 22.966 ns | 0.3107 ns | 0.2906 ns | Dictionary | TryGetValue | - | - | - | - |
| DictionaryTryGetValue | 4 | 10 | False | 17.533 ns | 0.2619 ns | 0.2322 ns | Dictionary | TryGetValue | - | - | - | - |
| DictionaryGet | 4 | 10 | True | 20.527 ns | 0.4096 ns | 0.3631 ns | Dictionary | Get | - | - | - | - |
| DictionarySet | 4 | 10 | True | 22.659 ns | 0.4795 ns | 0.4710 ns | Dictionary | Set | - | - | - | - |
| DictionaryTryGetValue | 4 | 10 | True | 23.763 ns | 0.5105 ns | 0.7157 ns | Dictionary | TryGetValue | - | - | - | - |
| DictionaryTryGetValue | 49 | 50 | False | 17.903 ns | 0.2371 ns | 0.2218 ns | Dictionary | TryGetValue | - | - | - | - |
| DictionaryGet | 49 | 50 | True | 27.182 ns | 0.5123 ns | 0.4792 ns | Dictionary | Get | - | - | - | - |
| DictionarySet | 49 | 50 | True | 31.312 ns | 0.5979 ns | 0.5300 ns | Dictionary | Set | - | - | - | - |
| DictionaryTryGetValue | 49 | 50 | True | 31.379 ns | 0.5922 ns | 0.5540 ns | Dictionary | TryGetValue | - | - | - | - |
| DictionaryTryGetValue | 49 | 100 | False | 17.834 ns | 0.2285 ns | 0.2137 ns | Dictionary | TryGetValue | - | - | - | - |
| DictionaryGet | 49 | 100 | True | 27.431 ns | 0.6526 ns | 0.7769 ns | Dictionary | Get | - | - | - | - |
| DictionarySet | 49 | 100 | True | 32.476 ns | 0.6905 ns | 0.9451 ns | Dictionary | Set | - | - | - | - |
| DictionaryTryGetValue | 49 | 100 | True | 30.707 ns | 0.6214 ns | 0.6907 ns | Dictionary | TryGetValue | - | - | - | - |
| DictionaryTryGetValue | 9 | 10 | False | 16.461 ns | 0.3712 ns | 0.3290 ns | Dictionary | TryGetValue | - | - | - | - |
| DictionaryGet | 9 | 10 | True | 20.414 ns | 0.4976 ns | 0.6293 ns | Dictionary | Get | - | - | - | - |
| DictionarySet | 9 | 10 | True | 23.209 ns | 0.5075 ns | 0.6946 ns | Dictionary | Set | - | - | - | - |
| DictionaryTryGetValue | 9 | 10 | True | 23.346 ns | 0.4882 ns | 0.4795 ns | Dictionary | TryGetValue | - | - | - | - |
| DictionaryTryGetValue | 9 | 20 | False | 16.640 ns | 0.2802 ns | 0.2621 ns | Dictionary | TryGetValue | - | - | - | - |
| DictionaryGet | 9 | 20 | True | 19.984 ns | 0.3871 ns | 0.3621 ns | Dictionary | Get | - | - | - | - |
| DictionarySet | 9 | 20 | True | 22.587 ns | 0.4859 ns | 0.5200 ns | Dictionary | Set | - | - | - | - |
| DictionaryTryGetValue | 9 | 20 | True | 23.200 ns | 0.3154 ns | 0.2796 ns | Dictionary | TryGetValue | - | - | - | - |
| DictionaryTryGetValue | 99 | 100 | False | 20.140 ns | 0.4241 ns | 0.3967 ns | Dictionary | TryGetValue | - | - | - | - |
| DictionaryGet | 99 | 100 | True | 26.831 ns | 0.6260 ns | 0.6148 ns | Dictionary | Get | - | - | - | - |
| DictionarySet | 99 | 100 | True | 31.983 ns | 0.4271 ns | 0.3566 ns | Dictionary | Set | - | - | - | - |
| DictionaryTryGetValue | 99 | 100 | True | 30.315 ns | 0.6280 ns | 0.7232 ns | Dictionary | TryGetValue | - | - | - | - |
| ExpandoObjectTryGetValue | 0 | 0 | False | 9.046 ns | 0.2162 ns | 0.2022 ns | ExpandoObject | TryGetValue | - | - | - | - |
| ExpandoObjectTryGetValue | 0 | 5 | False | 45.418 ns | 0.6394 ns | 0.5340 ns | ExpandoObject | TryGetValue | - | - | - | - |
| ExpandoObjectGet | 0 | 5 | True | 13.172 ns | 0.3510 ns | 0.3283 ns | ExpandoObject | Get | - | - | - | - |
| ExpandoObjectSet | 0 | 5 | True | 35.668 ns | 0.5579 ns | 0.4658 ns | ExpandoObject | Set | - | - | - | - |
| ExpandoObjectTryGetValue | 0 | 5 | True | 13.681 ns | 0.3004 ns | 0.3085 ns | ExpandoObject | TryGetValue | - | - | - | - |
| ExpandoObjectTryGetValue | 0 | 10 | False | 100.642 ns | 2.0131 ns | 1.8830 ns | ExpandoObject | TryGetValue | - | - | - | - |
| ExpandoObjectGet | 0 | 10 | True | 12.590 ns | 0.3161 ns | 0.2957 ns | ExpandoObject | Get | - | - | - | - |
| ExpandoObjectSet | 0 | 10 | True | 35.978 ns | 0.6904 ns | 0.6458 ns | ExpandoObject | Set | - | - | - | - |
| ExpandoObjectTryGetValue | 0 | 10 | True | 14.747 ns | 0.2862 ns | 0.2677 ns | ExpandoObject | TryGetValue | - | - | - | - |
| ExpandoObjectTryGetValue | 0 | 20 | False | 165.560 ns | 2.9471 ns | 2.6125 ns | ExpandoObject | TryGetValue | - | - | - | - |
| ExpandoObjectGet | 0 | 20 | True | 13.148 ns | 0.2886 ns | 0.2699 ns | ExpandoObject | Get | - | - | - | - |
| ExpandoObjectSet | 0 | 20 | True | 36.707 ns | 0.7458 ns | 0.7980 ns | ExpandoObject | Set | - | - | - | - |
| ExpandoObjectTryGetValue | 0 | 20 | True | 14.731 ns | 0.3411 ns | 0.3350 ns | ExpandoObject | TryGetValue | - | - | - | - |
| ExpandoObjectTryGetValue | 0 | 50 | False | 348.615 ns | 5.6765 ns | 5.3098 ns | ExpandoObject | TryGetValue | - | - | - | - |
| ExpandoObjectGet | 0 | 50 | True | 12.812 ns | 0.3486 ns | 0.4014 ns | ExpandoObject | Get | - | - | - | - |
| ExpandoObjectSet | 0 | 50 | True | 37.482 ns | 0.7812 ns | 0.8996 ns | ExpandoObject | Set | - | - | - | - |
| ExpandoObjectTryGetValue | 0 | 50 | True | 14.475 ns | 0.2792 ns | 0.2475 ns | ExpandoObject | TryGetValue | - | - | - | - |
| ExpandoObjectTryGetValue | 0 | 100 | False | 624.619 ns | 11.6128 ns | 11.4053 ns | ExpandoObject | TryGetValue | - | - | - | - |
| ExpandoObjectGet | 0 | 100 | True | 13.031 ns | 0.3542 ns | 0.3479 ns | ExpandoObject | Get | - | - | - | - |
| ExpandoObjectSet | 0 | 100 | True | 36.148 ns | 0.7526 ns | 0.7391 ns | ExpandoObject | Set | - | - | - | - |
| ExpandoObjectTryGetValue | 0 | 100 | True | 13.702 ns | 0.3182 ns | 0.3268 ns | ExpandoObject | TryGetValue | - | - | - | - |
| ExpandoObjectTryGetValue | 19 | 20 | False | 180.054 ns | 3.3982 ns | 3.1786 ns | ExpandoObject | TryGetValue | - | - | - | - |
| ExpandoObjectGet | 19 | 20 | True | 187.483 ns | 3.7734 ns | 4.0375 ns | ExpandoObject | Get | - | - | - | - |
| ExpandoObjectSet | 19 | 20 | True | 229.445 ns | 4.5486 ns | 5.2381 ns | ExpandoObject | Set | - | - | - | - |
| ExpandoObjectTryGetValue | 19 | 20 | True | 208.971 ns | 4.1302 ns | 4.0564 ns | ExpandoObject | TryGetValue | - | - | - | - |
| ExpandoObjectTryGetValue | 2 | 5 | False | 46.431 ns | 0.9216 ns | 0.8620 ns | ExpandoObject | TryGetValue | - | - | - | - |
| ExpandoObjectGet | 2 | 5 | True | 30.994 ns | 0.7089 ns | 0.6631 ns | ExpandoObject | Get | - | - | - | - |
| ExpandoObjectSet | 2 | 5 | True | 49.321 ns | 1.0012 ns | 1.0281 ns | ExpandoObject | Set | - | - | - | - |
| ExpandoObjectTryGetValue | 2 | 5 | True | 33.398 ns | 0.6368 ns | 0.5957 ns | ExpandoObject | TryGetValue | - | - | - | - |
| ExpandoObjectTryGetValue | 24 | 50 | False | 467.483 ns | 8.3370 ns | 7.3906 ns | ExpandoObject | TryGetValue | - | - | - | - |
| ExpandoObjectGet | 24 | 50 | True | 227.741 ns | 4.5164 ns | 5.0199 ns | ExpandoObject | Get | - | - | - | - |
| ExpandoObjectSet | 24 | 50 | True | 271.498 ns | 5.4293 ns | 6.6677 ns | ExpandoObject | Set | - | - | - | - |
| ExpandoObjectTryGetValue | 24 | 50 | True | 239.379 ns | 3.1897 ns | 2.9836 ns | ExpandoObject | TryGetValue | - | - | - | - |
| ExpandoObjectTryGetValue | 4 | 5 | False | 42.991 ns | 0.8998 ns | 0.8837 ns | ExpandoObject | TryGetValue | - | - | - | - |
| ExpandoObjectGet | 4 | 5 | True | 50.691 ns | 0.9643 ns | 0.9020 ns | ExpandoObject | Get | - | - | - | - |
| ExpandoObjectSet | 4 | 5 | True | 69.833 ns | 1.0319 ns | 0.9652 ns | ExpandoObject | Set | - | - | - | - |
| ExpandoObjectTryGetValue | 4 | 5 | True | 51.923 ns | 0.9435 ns | 0.8826 ns | ExpandoObject | TryGetValue | - | - | - | - |
| ExpandoObjectTryGetValue | 4 | 10 | False | 102.509 ns | 1.9302 ns | 1.8055 ns | ExpandoObject | TryGetValue | - | - | - | - |
| ExpandoObjectGet | 4 | 10 | True | 49.250 ns | 1.0272 ns | 1.1417 ns | ExpandoObject | Get | - | - | - | - |
| ExpandoObjectSet | 4 | 10 | True | 69.956 ns | 1.3644 ns | 1.3401 ns | ExpandoObject | Set | - | - | - | - |
| ExpandoObjectTryGetValue | 4 | 10 | True | 51.765 ns | 1.0084 ns | 0.9433 ns | ExpandoObject | TryGetValue | - | - | - | - |
| ExpandoObjectTryGetValue | 49 | 50 | False | 449.021 ns | 8.8644 ns | 9.4848 ns | ExpandoObject | TryGetValue | - | - | - | - |
| ExpandoObjectGet | 49 | 50 | True | 457.885 ns | 7.4956 ns | 8.0202 ns | ExpandoObject | Get | - | - | - | - |
| ExpandoObjectSet | 49 | 50 | True | 556.925 ns | 10.4062 ns | 10.2203 ns | ExpandoObject | Set | - | - | - | - |
| ExpandoObjectTryGetValue | 49 | 50 | True | 464.848 ns | 6.8804 ns | 6.0993 ns | ExpandoObject | TryGetValue | - | - | - | - |
| ExpandoObjectTryGetValue | 49 | 100 | False | 943.999 ns | 18.2708 ns | 17.0905 ns | ExpandoObject | TryGetValue | - | - | - | - |
| ExpandoObjectGet | 49 | 100 | True | 471.064 ns | 6.6909 ns | 5.9314 ns | ExpandoObject | Get | - | - | - | - |
| ExpandoObjectSet | 49 | 100 | True | 563.175 ns | 10.8739 ns | 12.0863 ns | ExpandoObject | Set | - | - | - | - |
| ExpandoObjectTryGetValue | 49 | 100 | True | 499.154 ns | 8.2352 ns | 7.7033 ns | ExpandoObject | TryGetValue | - | - | - | - |
| ExpandoObjectTryGetValue | 9 | 10 | False | 101.670 ns | 1.8778 ns | 1.7565 ns | ExpandoObject | TryGetValue | - | - | - | - |
| ExpandoObjectGet | 9 | 10 | True | 108.389 ns | 2.1175 ns | 1.9807 ns | ExpandoObject | Get | - | - | - | - |
| ExpandoObjectSet | 9 | 10 | True | 133.436 ns | 2.4353 ns | 2.2780 ns | ExpandoObject | Set | - | - | - | - |
| ExpandoObjectTryGetValue | 9 | 10 | True | 107.786 ns | 2.1035 ns | 1.9676 ns | ExpandoObject | TryGetValue | - | - | - | - |
| ExpandoObjectTryGetValue | 9 | 20 | False | 166.860 ns | 2.5469 ns | 2.3823 ns | ExpandoObject | TryGetValue | - | - | - | - |
| ExpandoObjectGet | 9 | 20 | True | 104.688 ns | 1.6822 ns | 1.5736 ns | ExpandoObject | Get | - | - | - | - |
| ExpandoObjectSet | 9 | 20 | True | 132.311 ns | 2.3239 ns | 2.1738 ns | ExpandoObject | Set | - | - | - | - |
| ExpandoObjectTryGetValue | 9 | 20 | True | 102.958 ns | 1.7901 ns | 1.6745 ns | ExpandoObject | TryGetValue | - | - | - | - |
| ExpandoObjectTryGetValue | 99 | 100 | False | 909.978 ns | 17.4946 ns | 17.1820 ns | ExpandoObject | TryGetValue | - | - | - | - |
| ExpandoObjectGet | 99 | 100 | True | 915.002 ns | 12.8453 ns | 12.0155 ns | ExpandoObject | Get | - | - | - | - |
| ExpandoObjectSet | 99 | 100 | True | 1,112.395 ns | 21.4921 ns | 27.1806 ns | ExpandoObject | Set | - | - | - | - |
| ExpandoObjectTryGetValue | 99 | 100 | True | 954.111 ns | 18.4251 ns | 17.2348 ns | ExpandoObject | TryGetValue | - | - | - | - |
This benchmark compares the lookup time for Dictionary<TKey, TValue> vs ConcurrentDictionary<TKey, TValue>.
The bechmark is measuring a single non parallel lookup.
| Method | items | key | Mean | Error | StdDev | Median |
|---|---|---|---|---|---|---|
| ConcurrentDictionaryGetOrAdd | 1 | 0 | 23.065 ns | 0.2962 ns | 0.2771 ns | 22.967 ns |
| ConcurrentDictionaryGetOrAdd | 1 | 0 | 23.081 ns | 0.2467 ns | 0.2187 ns | 23.114 ns |
| ConcurrentDictionaryGetOrAdd | 1 | 0 | 22.838 ns | 0.1512 ns | 0.1340 ns | 22.839 ns |
| ConcurrentDictionaryGetOrAdd | 10 | 0 | 23.136 ns | 0.2094 ns | 0.1856 ns | 23.119 ns |
| ConcurrentDictionaryGetOrAdd | 10 | 4 | 23.031 ns | 0.1429 ns | 0.1266 ns | 23.052 ns |
| ConcurrentDictionaryGetOrAdd | 10 | 9 | 23.181 ns | 0.2192 ns | 0.1830 ns | 23.177 ns |
| ConcurrentDictionaryGetOrAdd | 100 | 0 | 23.257 ns | 0.4297 ns | 0.3809 ns | 23.156 ns |
| ConcurrentDictionaryGetOrAdd | 100 | 49 | 23.197 ns | 0.1905 ns | 0.1591 ns | 23.269 ns |
| ConcurrentDictionaryGetOrAdd | 100 | 99 | 24.250 ns | 0.5749 ns | 0.7675 ns | 24.457 ns |
| ConcurrentDictionaryGetOrAdd | 1000 | 0 | 25.083 ns | 0.5916 ns | 0.4940 ns | 24.917 ns |
| ConcurrentDictionaryGetOrAdd | 1000 | 499 | 25.295 ns | 0.2937 ns | 0.2603 ns | 25.338 ns |
| ConcurrentDictionaryGetOrAdd | 1000 | 999 | 26.581 ns | 0.5859 ns | 0.4892 ns | 26.507 ns |
| ConcurrentDictionaryGetOrAdd | 10000 | 0 | 26.830 ns | 0.5551 ns | 0.5192 ns | 26.781 ns |
| ConcurrentDictionaryGetOrAdd | 10000 | 4999 | 28.191 ns | 0.6835 ns | 0.7019 ns | 27.986 ns |
| ConcurrentDictionaryGetOrAdd | 10000 | 9999 | 28.176 ns | 0.3369 ns | 0.2987 ns | 28.092 ns |
| ConcurrentDictionaryGetOrAdd | 100000 | 0 | 28.083 ns | 0.3659 ns | 0.3422 ns | 28.127 ns |
| ConcurrentDictionaryGetOrAdd | 100000 | 49999 | 28.259 ns | 0.6713 ns | 0.6593 ns | 28.202 ns |
| ConcurrentDictionaryGetOrAdd | 100000 | 99999 | 26.985 ns | 0.2794 ns | 0.2333 ns | 27.086 ns |
| ConcurrentDictionaryGetOrAdd | 1000000 | 0 | 26.903 ns | 0.3711 ns | 0.3099 ns | 27.008 ns |
| ConcurrentDictionaryGetOrAdd | 1000000 | 499999 | 26.168 ns | 0.5377 ns | 0.5030 ns | 25.971 ns |
| ConcurrentDictionaryGetOrAdd | 1000000 | 999999 | 31.256 ns | 2.8223 ns | 8.2328 ns | 27.425 ns |
| DictionaryGet | 1 | 0 | 10.025 ns | 0.1623 ns | 0.1439 ns | 10.057 ns |
| DictionaryGet | 1 | 0 | 9.907 ns | 0.1467 ns | 0.1300 ns | 9.942 ns |
| DictionaryGet | 1 | 0 | 10.003 ns | 0.1092 ns | 0.1021 ns | 10.025 ns |
| DictionaryGet | 10 | 0 | 10.032 ns | 0.1444 ns | 0.1280 ns | 10.049 ns |
| DictionaryGet | 10 | 4 | 10.049 ns | 0.1154 ns | 0.1080 ns | 10.017 ns |
| DictionaryGet | 10 | 9 | 10.069 ns | 0.2136 ns | 0.1998 ns | 10.035 ns |
| DictionaryGet | 100 | 0 | 10.052 ns | 0.2667 ns | 0.2495 ns | 9.997 ns |
| DictionaryGet | 100 | 49 | 10.088 ns | 0.3103 ns | 0.3048 ns | 10.163 ns |
| DictionaryGet | 100 | 99 | 10.271 ns | 0.1848 ns | 0.1728 ns | 10.201 ns |
| DictionaryGet | 1000 | 0 | 10.152 ns | 0.2025 ns | 0.1894 ns | 10.045 ns |
| DictionaryGet | 1000 | 499 | 10.286 ns | 0.1599 ns | 0.1418 ns | 10.281 ns |
| DictionaryGet | 1000 | 999 | 10.215 ns | 0.2018 ns | 0.1888 ns | 10.187 ns |
| DictionaryGet | 10000 | 0 | 10.357 ns | 0.1731 ns | 0.1351 ns | 10.328 ns |
| DictionaryGet | 10000 | 4999 | 10.291 ns | 0.1789 ns | 0.1586 ns | 10.333 ns |
| DictionaryGet | 10000 | 9999 | 10.476 ns | 0.1298 ns | 0.1215 ns | 10.481 ns |
| DictionaryGet | 100000 | 0 | 10.324 ns | 0.1961 ns | 0.1738 ns | 10.295 ns |
| DictionaryGet | 100000 | 49999 | 10.438 ns | 0.2361 ns | 0.2209 ns | 10.381 ns |
| DictionaryGet | 100000 | 99999 | 10.377 ns | 0.2189 ns | 0.1941 ns | 10.372 ns |
| DictionaryGet | 1000000 | 0 | 10.309 ns | 0.1888 ns | 0.1766 ns | 10.358 ns |
| DictionaryGet | 1000000 | 499999 | 10.274 ns | 0.1737 ns | 0.1451 ns | 10.252 ns |
| DictionaryGet | 1000000 | 999999 | 10.380 ns | 0.1454 ns | 0.1360 ns | 10.393 ns |
This benchmark compares the performance of different hash algorithm implementations.
| Method | Mean | Error | StdDev | Gen 0 | Gen 1 | Gen 2 | Allocated |
|---|---|---|---|---|---|---|---|
| Md5 | 3.805 us | 0.0378 us | 0.0335 us | 0.0191 | - | - | 80 B |
| Sha1 | 3.521 us | 0.0507 us | 0.0449 us | 0.0229 | - | - | 96 B |
| Sha256 | 8.480 us | 0.0919 us | 0.0860 us | 0.0153 | - | - | 112 B |
| Sha384 | 5.025 us | 0.0469 us | 0.0439 us | 0.0305 | - | - | 144 B |
| Sha512 | 4.985 us | 0.0528 us | 0.0494 us | 0.0381 | - | - | 176 B |
This benchmark compares the performance of iterating over different types of collections.
| Method | Mean | Error | StdDev | Gen 0 | Gen 1 | Gen 2 | Allocated |
|---|---|---|---|---|---|---|---|
| ForArray | 2.226 ms | 0.0165 ms | 0.0154 ms | - | - | - | - |
| ForIList | 7.002 ms | 0.0480 ms | 0.0426 ms | - | - | - | - |
| ForList | 2.254 ms | 0.0121 ms | 0.0108 ms | - | - | - | - |
| ForeachArray | 2.208 ms | 0.0191 ms | 0.0179 ms | - | - | - | - |
| ForeachIEnumerable | 7.194 ms | 0.0659 ms | 0.0617 ms | - | - | - | 40 B |
| ForeachIList | 12.415 ms | 0.0757 ms | 0.0671 ms | - | - | - | 40 B |
| ForeachList | 5.032 ms | 0.0443 ms | 0.0414 ms | - | - | - | - |
| ForeachArrayAsIEnumerable | 7.268 ms | 0.0567 ms | 0.0530 ms | - | - | - | 32 B |
This benchmark compares different ways to convert a IEnumerable to list.
Naive uses source.ToList().
Optimized uses (source as List<T>) ?? source.ToList().
| Method | Mean | Error | StdDev | Gen 0 | Gen 1 | Gen 2 | Allocated |
|---|---|---|---|---|---|---|---|
| NaiveFromArray | 136.811 ns | 2.1415 ns | 1.8984 ns | 0.0913 | - | - | 144 B |
| NaiveFromList | 106.203 ns | 1.4056 ns | 1.2460 ns | 0.0914 | - | - | 144 B |
| OptimizedFromArray | 143.095 ns | 1.6491 ns | 1.5426 ns | 0.0913 | - | - | 144 B |
| OptimizedFromList | 3.389 ns | 0.0838 ns | 0.0784 ns | - | - | - | - |