66 lines
2.1 KiB
Plaintext
66 lines
2.1 KiB
Plaintext
|
== Resources
|
||
|
|
|
||
|
|
=== Documentation
|
||
|
|
|
||
|
|
* https://learn.microsoft.com/en-us/dotnet/api/system.collections.generic.list-1.find[List<T>.Find(Predicate<T>)]
|
||
|
|
* https://learn.microsoft.com/en-us/dotnet/api/system.array.find[Array.Find<T>(T[\], Predicate<T>)]
|
||
|
|
* https://learn.microsoft.com/en-us/dotnet/api/system.collections.immutable.immutablelist-1.find[ImmutableList<T>.Find(Predicate<T>)]
|
||
|
|
* https://learn.microsoft.com/en-us/dotnet/api/system.linq.enumerable.firstordefault[Enumerable.FirstOrDefault(Predicate<T>)]
|
||
|
|
|
||
|
|
=== Benchmarks
|
||
|
|
|
||
|
|
[options="header"]
|
||
|
|
|===
|
||
|
|
| Method | Runtime | Mean | StdDev | Ratio | Allocated
|
||
|
|
| FirstOrDefault | .NET 7.0 | 5.373 ms | 0.1049 ms | 1.00 | 125 KB
|
||
|
|
| Find | .NET 7.0 | 1.691 ms | 0.0334 ms | 0.32 | 85.94 KB
|
||
|
|
| FirstOrDefault | .NET Framework 4.6.2 | 5.035 ms | 0.0421 ms | 1.00 | 125.38 KB
|
||
|
|
| Find | .NET Framework 4.6.2 | 1.779 ms | 0.0107 ms | 0.35 | 86.2 KB
|
||
|
|
|===
|
||
|
|
|
||
|
|
The results were generated by running the following snippet with https://github.com/dotnet/BenchmarkDotNet[BenchmarkDotNet]:
|
||
|
|
|
||
|
|
[source,csharp]
|
||
|
|
----
|
||
|
|
private List<string> data;
|
||
|
|
private Random random = new Random();
|
||
|
|
|
||
|
|
[Params(1_000)]
|
||
|
|
public int N { get; set; }
|
||
|
|
|
||
|
|
[GlobalSetup]
|
||
|
|
public void Setup() =>
|
||
|
|
data = Enumerable.Range(0, N).Select(x => Guid.NewGuid().ToString()).ToList();
|
||
|
|
|
||
|
|
[Benchmark(Baseline = true)]
|
||
|
|
public void FirstOrDefault()
|
||
|
|
{
|
||
|
|
for (var i = 0; i < N; i++)
|
||
|
|
{
|
||
|
|
var value = data[random.Next(N - 1)];
|
||
|
|
_ = data.FirstOrDefault(x => x == value); // Enumerable.FirstOrDefault()
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
[Benchmark]
|
||
|
|
public void Find()
|
||
|
|
{
|
||
|
|
for (var i = 0; i < N; i++)
|
||
|
|
{
|
||
|
|
var value = data[random.Next(N - 1)];
|
||
|
|
_ = data.Find(x => x == value); // List<T>.Find()
|
||
|
|
}
|
||
|
|
}
|
||
|
|
----
|
||
|
|
|
||
|
|
Hardware configuration:
|
||
|
|
|
||
|
|
[source]
|
||
|
|
----
|
||
|
|
BenchmarkDotNet=v0.13.5, OS=Windows 10 (10.0.19045.2846/22H2/2022Update)
|
||
|
|
11th Gen Intel Core i7-11850H 2.50GHz, 1 CPU, 16 logical and 8 physical cores
|
||
|
|
[Host] : .NET Framework 4.8 (4.8.4614.0), X64 RyuJIT VectorSize=256
|
||
|
|
.NET 7.0 : .NET 7.0.5 (7.0.523.17405), X64 RyuJIT AVX2
|
||
|
|
.NET Framework 4.6.2 : .NET Framework 4.8 (4.8.4614.0), X64 RyuJIT VectorSize=256
|
||
|
|
----
|