This benchmark compares record initialisation from another instance using the with keyword to initialisation using the
primary constructor of the record and passing the property values of the other instance manually, for a varying number of properties set.
Each method name starts with the type of record that's being benchmarked, e.g. Record1 or RecordStructReadonly5.
The number in the record indicates the number of properties that that record type possesses.
Next, each method name contains With or Constructor to indicate how the record is instantiated.
Finally, Sparse, Half, Dense and All indicate how many properties will be changed compared to the original instance.
BenchmarkDotNet v0.13.7, Windows 11 (10.0.22621.2134/22H2/2022Update/SunValley2)
AMD Ryzen 9 5900X, 1 CPU, 24 logical and 12 physical cores
.NET SDK 7.0.306
[Host] : .NET 7.0.10 (7.0.1023.36312), X64 RyuJIT AVX2
DefaultJob : .NET 7.0.10 (7.0.1023.36312), X64 RyuJIT AVX2| Method | Mean | Error | StdDev | Median | Gen0 | Allocated |
|---|---|---|---|---|---|---|
| Record1WithAll | 3.4821 ns | 0.0111 ns | 0.0098 ns | 3.4826 ns | 0.0014 | 24 B |
| Record1ConstructorAll | 2.6228 ns | 0.0290 ns | 0.0227 ns | 2.6251 ns | 0.0014 | 24 B |
| RecordStruct1WithAll | 0.0061 ns | 0.0025 ns | 0.0023 ns | 0.0065 ns | - | - |
| RecordStruct1ConstructorAll | 0.0008 ns | 0.0011 ns | 0.0011 ns | 0.0003 ns | - | - |
| RecordStructReadonly1WithAll | 0.0040 ns | 0.0019 ns | 0.0018 ns | 0.0042 ns | - | - |
| RecordStructReadonly1ConstructorAll | 0.0009 ns | 0.0010 ns | 0.0008 ns | 0.0011 ns | - | - |
| Record5WithHalf | 9.5052 ns | 0.2546 ns | 0.7507 ns | 9.4989 ns | 0.0024 | 40 B |
| Record5WithDense | 4.3245 ns | 0.0270 ns | 0.0252 ns | 4.3284 ns | 0.0024 | 40 B |
| Record5WithAll | 4.0022 ns | 0.0289 ns | 0.0271 ns | 4.0021 ns | 0.0024 | 40 B |
| Record5ConstructorHalf | 3.1798 ns | 0.0299 ns | 0.0280 ns | 3.1753 ns | 0.0024 | 40 B |
| Record5ConstructorDense | 3.2178 ns | 0.0279 ns | 0.0261 ns | 3.2171 ns | 0.0024 | 40 B |
| Record5ConstructorAll | 2.9336 ns | 0.0349 ns | 0.0326 ns | 2.9334 ns | 0.0024 | 40 B |
| RecordStruct5WithHalf | 3.7840 ns | 0.0144 ns | 0.0135 ns | 3.7909 ns | - | - |
| RecordStruct5WithDense | 3.9899 ns | 0.0157 ns | 0.0147 ns | 3.9979 ns | - | - |
| RecordStruct5WithAll | 4.0000 ns | 0.0155 ns | 0.0145 ns | 4.0077 ns | - | - |
| RecordStruct5ConstructorHalf | 4.2072 ns | 0.0174 ns | 0.0162 ns | 4.2131 ns | - | - |
| RecordStruct5ConstructorDense | 4.2027 ns | 0.0183 ns | 0.0172 ns | 4.2106 ns | - | - |
| RecordStruct5ConstructorAll | 4.0008 ns | 0.0179 ns | 0.0168 ns | 4.0076 ns | - | - |
| RecordStructReadonly5WithHalf | 3.9405 ns | 0.0987 ns | 0.1175 ns | 3.9119 ns | - | - |
| RecordStructReadonly5WithDense | 4.3436 ns | 0.0269 ns | 0.0251 ns | 4.3482 ns | - | - |
| RecordStructReadonly5WithAll | 4.3517 ns | 0.0255 ns | 0.0239 ns | 4.3396 ns | - | - |
| RecordStructReadonly5ConstructorHalf | 4.5452 ns | 0.0246 ns | 0.0231 ns | 4.5443 ns | - | - |
| RecordStructReadonly5ConstructorDense | 4.2131 ns | 0.0169 ns | 0.0158 ns | 4.2211 ns | - | - |
| RecordStructReadonly5ConstructorAll | 4.0045 ns | 0.0208 ns | 0.0195 ns | 4.0156 ns | - | - |
| Record8WithHalf | 4.4365 ns | 0.0147 ns | 0.0137 ns | 4.4382 ns | 0.0029 | 48 B |
| Record8WithDense | 4.4652 ns | 0.0133 ns | 0.0124 ns | 4.4653 ns | 0.0029 | 48 B |
| Record8WithAll | 4.8379 ns | 0.0087 ns | 0.0072 ns | 4.8398 ns | 0.0029 | 48 B |
| Record8ConstructorHalf | 3.5070 ns | 0.0140 ns | 0.0131 ns | 3.5051 ns | 0.0029 | 48 B |
| Record8ConstructorDense | 3.3372 ns | 0.0149 ns | 0.0139 ns | 3.3385 ns | 0.0029 | 48 B |
| Record8ConstructorAll | 3.2537 ns | 0.0158 ns | 0.0148 ns | 3.2487 ns | 0.0029 | 48 B |
| RecordStruct8WithHalf | 5.4228 ns | 0.0162 ns | 0.0151 ns | 5.4237 ns | - | - |
| RecordStruct8WithDense | 3.7989 ns | 0.0037 ns | 0.0035 ns | 3.7978 ns | - | - |
| RecordStruct8WithAll | 4.5903 ns | 0.0139 ns | 0.0130 ns | 4.5954 ns | - | - |
| RecordStruct8ConstructorHalf | 4.6274 ns | 0.0193 ns | 0.0171 ns | 4.6339 ns | - | - |
| RecordStruct8ConstructorDense | 4.8571 ns | 0.0132 ns | 0.0123 ns | 4.8610 ns | - | - |
| RecordStruct8ConstructorAll | 4.5821 ns | 0.0152 ns | 0.0143 ns | 4.5910 ns | - | - |
| RecordStructReadonly8WithHalf | 5.4224 ns | 0.0166 ns | 0.0155 ns | 5.4287 ns | - | - |
| RecordStructReadonly8WithDense | 3.7864 ns | 0.0126 ns | 0.0118 ns | 3.7894 ns | - | - |
| RecordStructReadonly8WithAll | 4.8503 ns | 0.0161 ns | 0.0150 ns | 4.8565 ns | - | - |
| RecordStructReadonly8ConstructorHalf | 4.6247 ns | 0.0216 ns | 0.0202 ns | 4.6275 ns | - | - |
| RecordStructReadonly8ConstructorDense | 4.8579 ns | 0.0260 ns | 0.0243 ns | 4.8639 ns | - | - |
| RecordStructReadonly8ConstructorAll | 4.5960 ns | 0.0129 ns | 0.0120 ns | 4.5978 ns | - | - |
| Record13WithSparse | 6.1747 ns | 0.0362 ns | 0.0339 ns | 6.1764 ns | 0.0043 | 72 B |
| Record13WithHalf | 6.5044 ns | 0.0355 ns | 0.0332 ns | 6.5064 ns | 0.0043 | 72 B |
| Record13WithDense | 6.7412 ns | 0.0504 ns | 0.0471 ns | 6.7422 ns | 0.0043 | 72 B |
| Record13WithAll | 6.9935 ns | 0.0577 ns | 0.0540 ns | 7.0070 ns | 0.0043 | 72 B |
| Record13ConstructorSparse | 7.1270 ns | 0.0409 ns | 0.0382 ns | 7.1286 ns | 0.0043 | 72 B |
| Record13ConstructorHalf | 5.3447 ns | 0.0259 ns | 0.0242 ns | 5.3541 ns | 0.0043 | 72 B |
| Record13ConstructorDense | 4.3330 ns | 0.0263 ns | 0.0246 ns | 4.3339 ns | 0.0043 | 72 B |
| Record13ConstructorAll | 4.2269 ns | 0.0796 ns | 0.0621 ns | 4.2175 ns | 0.0043 | 72 B |
| RecordStruct13WithSparse | 4.2729 ns | 0.0054 ns | 0.0048 ns | 4.2735 ns | - | - |
| RecordStruct13WithHalf | 4.6411 ns | 0.0427 ns | 0.0333 ns | 4.6383 ns | - | - |
| RecordStruct13WithDense | 5.1266 ns | 0.0218 ns | 0.0204 ns | 5.1343 ns | - | - |
| RecordStruct13WithAll | 5.2776 ns | 0.0212 ns | 0.0199 ns | 5.2838 ns | - | - |
| RecordStruct13ConstructorSparse | 6.3098 ns | 0.0353 ns | 0.0330 ns | 6.3189 ns | - | - |
| RecordStruct13ConstructorHalf | 5.4644 ns | 0.0189 ns | 0.0177 ns | 5.4711 ns | - | - |
| RecordStruct13ConstructorDense | 5.8773 ns | 0.0257 ns | 0.0241 ns | 5.8831 ns | - | - |
| RecordStruct13ConstructorAll | 5.0333 ns | 0.0266 ns | 0.0249 ns | 5.0438 ns | - | - |
| RecordStructReadonly13WithSparse | 5.4863 ns | 0.0250 ns | 0.0234 ns | 5.4960 ns | - | - |
| RecordStructReadonly13WithHalf | 4.6379 ns | 0.0166 ns | 0.0155 ns | 4.6443 ns | - | - |
| RecordStructReadonly13WithDense | 5.0529 ns | 0.0247 ns | 0.0231 ns | 5.0621 ns | - | - |
| RecordStructReadonly13WithAll | 5.2729 ns | 0.0218 ns | 0.0204 ns | 5.2819 ns | - | - |
| RecordStructReadonly13ConstructorSparse | 6.3922 ns | 0.0161 ns | 0.0143 ns | 6.3948 ns | - | - |
| RecordStructReadonly13ConstructorHalf | 5.4532 ns | 0.0297 ns | 0.0278 ns | 5.4552 ns | - | - |
| RecordStructReadonly13ConstructorDense | 5.8863 ns | 0.0255 ns | 0.0239 ns | 5.8883 ns | - | - |
| RecordStructReadonly13ConstructorAll | 5.7882 ns | 0.0370 ns | 0.0346 ns | 5.7797 ns | - | - |
Benchmark.RecordStruct1WithAll: Default -> It seems that the distribution can have several modes (mValue = 3)Benchmark.Record5WithHalf: Default -> It seems that the distribution is bimodal (mValue = 3.76)
Benchmark.RecordStruct1WithAll: Default -> The method duration is indistinguishable from the empty method durationBenchmark.RecordStruct1ConstructorAll: Default -> The method duration is indistinguishable from the empty method durationBenchmark.RecordStructReadonly1WithAll: Default -> The method duration is indistinguishable from the empty method durationBenchmark.RecordStructReadonly1ConstructorAll: Default -> The method duration is indistinguishable from the empty method duration
Benchmark.Record1WithAll: Default -> 1 outlier was removed (5.93 ns)Benchmark.Record1ConstructorAll: Default -> 3 outliers were removed (4.98 ns..5.14 ns)Benchmark.RecordStruct1WithAll: Default -> 2 outliers were detected (1.11 ns,1.11 ns)Benchmark.RecordStructReadonly1ConstructorAll: Default -> 3 outliers were removed, 4 outliers were detected (1.09 ns,1.10 ns..1.10 ns)Benchmark.RecordStructReadonly5WithDense: Default -> 1 outlier was detected (5.44 ns)Benchmark.RecordStructReadonly5ConstructorDense: Default -> 3 outliers were detected (5.29 ns..5.29 ns)Benchmark.Record8WithAll: Default -> 2 outliers were removed, 3 outliers were detected (7.05 ns,7.09 ns,7.26 ns)Benchmark.RecordStruct8WithHalf: Default -> 3 outliers were detected (6.49 ns..6.50 ns)Benchmark.RecordStruct8ConstructorHalf: Default -> 1 outlier was removed, 4 outliers were detected (5.70 ns..5.70 ns,5.79 ns)Benchmark.RecordStruct8ConstructorDense: Default -> 1 outlier was detected (5.92 ns)Benchmark.RecordStructReadonly8ConstructorAll: Default -> 2 outliers were detected (5.68 ns,5.69 ns)Benchmark.Record13ConstructorSparse: Default -> 1 outlier was detected (9.25 ns)Benchmark.Record13ConstructorHalf: Default -> 1 outlier was detected (7.53 ns)Benchmark.Record13ConstructorDense: Default -> 1 outlier was detected (6.51 ns)Benchmark.Record13ConstructorAll: Default -> 3 outliers were removed (6.90 ns..7.08 ns)Benchmark.RecordStruct13WithSparse: Default -> 1 outlier was removed (5.40 ns)Benchmark.RecordStruct13WithHalf: Default -> 3 outliers were removed (6.01 ns..6.04 ns)Benchmark.RecordStruct13WithAll: Default -> 2 outliers were detected (6.34 ns, 6.34 ns)Benchmark.RecordStruct13ConstructorHalf: Default -> 2 outliers were detected (6.54 ns, 6.54 ns)Benchmark.RecordStructReadonly13WithHalf: Default -> 2 outliers were detected (5.72 ns, 5.72 ns)Benchmark.RecordStructReadonly13WithAll: Default -> 3 outliers were detected (6.33 ns..6.34 ns)Benchmark.RecordStructReadonly13ConstructorSparse: Default -> 1 outlier was removed (7.54 ns)