Multiple Returns Techniques This benchmark it to help determine the most appropriate pattern for returning multiple values
from a method:
out parametersreturning classes (Tuple<T...>)
returning structs (ValueTuple<T...>)
BenchmarkDotNet =v0.12.1, OS =Windows 10.0.18363.1016 (1909/November2018Update/19H2)
Intel Core i7-4790K CPU 4.00GHz (Haswell), 1 CPU, 8 logical and 4 physical cores
.NET Core SDK =5.0.100-preview.6.20318.15
[Host] : .NET Core 5.0.0 (CoreCLR 5.0.20.30506, CoreFX 5.0.20.30506), X64 RyuJIT
DefaultJob : .NET Core 5.0.0 (CoreCLR 5.0.20.30506, CoreFX 5.0.20.30506), X64 RyuJIT
Method
Mean
Error
StdDev
Median
return_object_1
5.512 ns
0.1352 ns
0.1660 ns
5.453 ns
out_object_1
7.174 ns
0.1311 ns
0.1226 ns
7.188 ns
tuple_object_1
12.453 ns
0.2740 ns
0.2814 ns
12.435 ns
valuetuple_object_1
8.831 ns
0.2009 ns
0.1973 ns
8.742 ns
out_object_2
14.012 ns
0.2429 ns
0.2599 ns
13.958 ns
tuple_object_2
18.416 ns
0.2248 ns
0.2103 ns
18.316 ns
valuetuple_object_2
17.783 ns
0.1786 ns
0.1583 ns
17.756 ns
out_object_3
19.789 ns
0.3101 ns
0.2901 ns
19.742 ns
tuple_object_3
25.341 ns
0.2785 ns
0.2469 ns
25.248 ns
valuetuple_object_3
24.357 ns
0.1456 ns
0.1216 ns
24.380 ns
out_object_4
27.393 ns
0.5725 ns
0.9406 ns
27.111 ns
tuple_object_4
31.564 ns
0.6439 ns
0.6613 ns
31.379 ns
valuetuple_object_4
31.492 ns
0.4104 ns
0.3638 ns
31.456 ns
out_object_5
32.031 ns
0.5698 ns
0.4758 ns
31.896 ns
tuple_object_5
38.926 ns
0.7763 ns
0.8940 ns
38.631 ns
valuetuple_object_5
38.895 ns
0.2511 ns
0.2097 ns
38.854 ns
out_object_6
38.134 ns
0.3765 ns
0.3522 ns
38.013 ns
tuple_object_6
56.387 ns
0.5732 ns
0.5081 ns
56.321 ns
valuetuple_object_6
47.245 ns
0.9334 ns
0.9987 ns
47.181 ns
out_object_7
46.267 ns
0.9470 ns
0.9301 ns
46.146 ns
tuple_object_7
55.636 ns
1.1037 ns
2.8292 ns
54.674 ns
valuetuple_object_7
57.058 ns
1.1644 ns
1.8802 ns
56.180 ns
BenchmarkDotNet =v0.12.1, OS =Windows 10.0.18363.1016 (1909/November2018Update/19H2)
Intel Core i7-4790K CPU 4.00GHz (Haswell), 1 CPU, 8 logical and 4 physical cores
.NET Core SDK =5.0.100-preview.6.20318.15
[Host] : .NET Core 5.0.0 (CoreCLR 5.0.20.30506, CoreFX 5.0.20.30506), X64 RyuJIT
DefaultJob : .NET Core 5.0.0 (CoreCLR 5.0.20.30506, CoreFX 5.0.20.30506), X64 RyuJIT
Method
Mean
Error
StdDev
Median
return_int_1
1.564 ns
0.0462 ns
0.0386 ns
1.571 ns
out_int_1
1.614 ns
0.0604 ns
0.1634 ns
1.545 ns
tuple_int_1
5.902 ns
0.1449 ns
0.1488 ns
5.878 ns
valuetuple_int_1
2.519 ns
0.0766 ns
0.1321 ns
2.508 ns
out_int_2
1.524 ns
0.0491 ns
0.0459 ns
1.506 ns
tuple_int_2
5.852 ns
0.0583 ns
0.0545 ns
5.835 ns
valuetuple_int_2
4.630 ns
0.0283 ns
0.0251 ns
4.625 ns
out_int_3
2.253 ns
0.0243 ns
0.0215 ns
2.250 ns
tuple_int_3
6.927 ns
0.0515 ns
0.0457 ns
6.917 ns
valuetuple_int_3
5.942 ns
0.0195 ns
0.0173 ns
5.937 ns
out_int_4
2.906 ns
0.0273 ns
0.0256 ns
2.894 ns
tuple_int_4
6.974 ns
0.0705 ns
0.0659 ns
6.982 ns
valuetuple_int_4
6.585 ns
0.0215 ns
0.0191 ns
6.583 ns
out_int_5
3.307 ns
0.0309 ns
0.0241 ns
3.306 ns
tuple_int_5
7.741 ns
0.0642 ns
0.0536 ns
7.764 ns
valuetuple_int_5
7.248 ns
0.1475 ns
0.1380 ns
7.351 ns
out_int_6
4.201 ns
0.1085 ns
0.1065 ns
4.186 ns
tuple_int_6
8.544 ns
0.1892 ns
0.2103 ns
8.500 ns
valuetuple_int_6
8.251 ns
0.1036 ns
0.0969 ns
8.221 ns
out_int_7
7.654 ns
0.1287 ns
0.1141 ns
7.663 ns
tuple_int_7
9.647 ns
0.2139 ns
0.2999 ns
9.598 ns
valuetuple_int_7
8.702 ns
0.1395 ns
0.1305 ns
8.641 ns