Atmos GasSpecificHeats in shared (#42136)

Content.Benchmarks/HeatCapacityBenchmark.cs

@@ -0,0 +1,83 @@
+using System.Threading.Tasks;
+using BenchmarkDotNet.Attributes;
+using Content.IntegrationTests;
+using Content.IntegrationTests.Pair;
+using Content.Server.Atmos.EntitySystems;
+using Content.Shared.Atmos;
+using Robust.Shared;
+using Robust.Shared.Analyzers;
+using Robust.Shared.GameObjects;
+
+namespace Content.Benchmarks;
+
+[Virtual]
+[GcServer(true)]
+[MemoryDiagnoser]
+public class HeatCapacityBenchmark
+{
+    private TestPair _pair = default!;
+    private IEntityManager _sEntMan = default!;
+    private IEntityManager _cEntMan = default!;
+    private Client.Atmos.EntitySystems.AtmosphereSystem _cAtmos = default!;
+    private AtmosphereSystem _sAtmos = default!;
+    private GasMixture _mix;
+
+    [GlobalSetup]
+    public async Task SetupAsync()
+    {
+        ProgramShared.PathOffset = "../../../../";
+        PoolManager.Startup();
+        _pair = await PoolManager.GetServerClient();
+        await _pair.Connect();
+        _cEntMan = _pair.Client.ResolveDependency<IEntityManager>();
+        _sEntMan = _pair.Server.ResolveDependency<IEntityManager>();
+        _cAtmos = _cEntMan.System<Client.Atmos.EntitySystems.AtmosphereSystem>();
+        _sAtmos = _sEntMan.System<AtmosphereSystem>();
+
+        const float volume = 2500f;
+        const float temperature = 293.15f;
+
+        const float o2 = 12.3f;
+        const float n2 = 45.6f;
+        const float co2 = 0.42f;
+        const float plasma = 0.05f;
+
+        _mix = new GasMixture(volume) { Temperature = temperature };
+
+        _mix.AdjustMoles(Gas.Oxygen, o2);
+        _mix.AdjustMoles(Gas.Nitrogen, n2);
+        _mix.AdjustMoles(Gas.CarbonDioxide, co2);
+        _mix.AdjustMoles(Gas.Plasma, plasma);
+    }
+
+    [Benchmark]
+    public async Task ClientHeatCapacityBenchmark()
+    {
+        await _pair.Client.WaitPost(delegate
+        {
+            for (var i = 0; i < 10000; i++)
+            {
+                _cAtmos.GetHeatCapacity(_mix, applyScaling: true);
+            }
+        });
+    }
+
+    [Benchmark]
+    public async Task ServerHeatCapacityBenchmark()
+    {
+        await _pair.Server.WaitPost(delegate
+        {
+            for (var i = 0; i < 10000; i++)
+            {
+                _sAtmos.GetHeatCapacity(_mix, applyScaling: true);
+            }
+        });
+    }
+
+    [GlobalCleanup]
+    public async Task CleanupAsync()
+    {
+        await _pair.DisposeAsync();
+        PoolManager.Shutdown();
+    }
+}