Add SpawnEquipDeleteBenchmark (#19566)

Content.Benchmarks/SpawnEquipDeleteBenchmark.cs

@@ -0,0 +1,66 @@
+using System.Threading.Tasks;
+using BenchmarkDotNet.Attributes;
+using Content.IntegrationTests;
+using Content.IntegrationTests.Pair;
+using Content.Server.Station.Systems;
+using Content.Shared.Roles;
+using Robust.Shared;
+using Robust.Shared.Analyzers;
+using Robust.Shared.GameObjects;
+using Robust.Shared.Map;
+
+namespace Content.Benchmarks;
+
+/// <summary>
+/// This benchmarks spawns several humans, gives them captain equipment and then deletes them.
+/// This measures performance for spawning, deletion, containers, and inventory code.
+/// </summary>
+[Virtual, MemoryDiagnoser]
+public class SpawnEquipDeleteBenchmark
+{
+    private TestPair _pair = default!;
+    private StationSpawningSystem _spawnSys = default!;
+    private const string Mob = "MobHuman";
+    private StartingGearPrototype _gear = default!;
+    private EntityUid _entity;
+    private EntityCoordinates _coords;
+
+    [Params(1, 4, 16, 64)]
+    public int N;
+
+    [GlobalSetup]
+    public async Task SetupAsync()
+    {
+        ProgramShared.PathOffset = "../../../../";
+        PoolManager.Startup(null);
+        _pair = await PoolManager.GetServerClient();
+        var server = _pair.Server;
+
+        var mapData = await _pair.CreateTestMap();
+        _coords = mapData.GridCoords;
+        _spawnSys = server.System<StationSpawningSystem>();
+        _gear = server.ProtoMan.Index<StartingGearPrototype>("CaptainGear");
+    }
+
+    [GlobalCleanup]
+    public async Task Cleanup()
+    {
+        await _pair.DisposeAsync();
+        PoolManager.Shutdown();
+    }
+
+    [Benchmark]
+    public async Task SpawnDeletePlayer()
+    {
+        await _pair.Server.WaitPost(() =>
+        {
+            var server = _pair.Server;
+            for (var i = 0; i < N; i++)
+            {
+                _entity = server.EntMan.SpawnAttachedTo(Mob, _coords);
+                _spawnSys.EquipStartingGear(_entity, _gear, null);
+                server.EntMan.DeleteEntity(_entity);
+            }
+        });
+    }
+}