add MinorPerfTweaks patch

Author: JonnyOThan

GameData/KSPCommunityFixes/Settings.cfg

@@ -448,6 +448,9 @@ KSP_COMMUNITY_FIXES
   // strut position tracking...
   PartSystemsFastUpdate = true
 
+  // Various small performance patches (volume normalizer, eva module checks)
+  MinorPerfTweaks = true
+
   // General micro-optimization of FlightIntegrator and VesselPrecalculate, significantely increase
   // framerate in large part count situations.
   FlightPerf = true

KSPCommunityFixes/KSPCommunityFixes.csproj

@@ -203,6 +203,7 @@
     <Compile Include="Modding\ReflectionTypeLoadExceptionHandler.cs" />
     <Compile Include="Performance\FewerSaves.cs" />
     <Compile Include="Performance\ConfigNodePerf.cs" />
+    <Compile Include="Performance\MinorPerfTweaks.cs" />
     <Compile Include="Performance\ModuleDockingNodeFindOtherNodesFaster.cs" />
     <Compile Include="Performance\OptimizedModuleRaycasts.cs" />
     <Compile Include="Performance\PQSCoroutineLeak.cs" />

KSPCommunityFixes/Performance/MinorPerfTweaks.cs

@@ -0,0 +1,78 @@
+using System;
+using System.Collections.Generic;
+using UnityEngine;
+
+namespace KSPCommunityFixes.Performance
+{
+    internal class MinorPerfTweaks : BasePatch
+    {
+        protected override Version VersionMin => new Version(1, 12, 3);
+
+        protected override void ApplyPatches()
+        {
+            AddPatch(PatchType.Override, typeof(Part), nameof(Part.isKerbalEVA));
+
+            AddPatch(PatchType.Override, typeof(VolumeNormalizer), nameof(VolumeNormalizer.Update));
+        }
+
+        // Called (sometimes multiple times) in Part.FixedUpdate()
+        public static bool Part_isKerbalEVA_Override(Part part)
+        {
+            part.cachedModules ??= new Dictionary<Type, PartModule>(10);
+
+            if (!part.cachedModules.TryGetValue(typeof(KerbalEVA), out PartModule module))
+            {
+                if (part.modules == null)
+                    return false;
+
+                List<PartModule> modules = part.modules.modules;
+                int moduleCount = modules.Count;
+                for (int i = 0; i < moduleCount; i++)
+                {
+                    if (modules[i] is KerbalEVA)
+                    {
+                        module = modules[i];
+                        break;
+                    }
+                }
+
+                part.cachedModules[typeof(KerbalEVA)] = module;
+            }
+
+            return module.IsNotNullRef();
+        }
+
+        // setting AudioListener.volume is actually quite costly (0.7% of the frame time),
+        // so avoid setting it when the value hasn't actually changed...
+        private static void VolumeNormalizer_Update_Override(VolumeNormalizer vn)
+        {
+            float newVolume;
+            if (GameSettings.SOUND_NORMALIZER_ENABLED)
+            {
+                vn.threshold = GameSettings.SOUND_NORMALIZER_THRESHOLD;
+                vn.sharpness = GameSettings.SOUND_NORMALIZER_RESPONSIVENESS;
+                AudioListener.GetOutputData(vn.samples, 0);
+                vn.level = 0f;
+
+                for (int i = 0; i < vn.sampleCount; i += 1 + GameSettings.SOUND_NORMALIZER_SKIPSAMPLES)
+                    vn.level = Mathf.Max(vn.level, Mathf.Abs(vn.samples[i]));
+
+                if (vn.level > vn.threshold)
+                    newVolume = vn.threshold / vn.level;
+                else
+                    newVolume = 1f;
+
+                newVolume = Mathf.Lerp(AudioListener.volume, newVolume * GameSettings.MASTER_VOLUME, vn.sharpness * Time.deltaTime);
+            }
+            else
+            {
+                newVolume = Mathf.Lerp(AudioListener.volume, GameSettings.MASTER_VOLUME, vn.sharpness * Time.deltaTime);
+            }
+
+            if (newVolume != vn.volume)
+                AudioListener.volume = newVolume;
+
+            vn.volume = newVolume;
+        }
+    }
+}

README.md

@@ -138,6 +138,7 @@ User options are available from the "ESC" in-game settings menu :<br/><img src="
 - [**ModuleDockingNodeFindOtherNodesFaster**](https://github.com/KSPModdingLibs/KSPCommunityFixes/pull/257) [KSP 1.12.3 - 1.12.5]<br/>Faster lookup of other docking nodes.
 - [**CollisionEnhancerFastUpdate**](https://github.com/KSPModdingLibs/KSPCommunityFixes/pull/257) [KSP 1.12.3 - 1.12.5]<br/>Optimization of the `CollisionEnhancer` component (responsible for part to terrain collision detection).
 - [**PartSystemsFastUpdate**](https://github.com/KSPModdingLibs/KSPCommunityFixes/pull/257) [KSP 1.12.3 - 1.12.5]<br/>Optimization of various flight scene auxiliary subsystems : temperature gauges, highlighter, strut position tracking...
+- [**MinorPerfTweaks**](https://github.com/KSPModdingLibs/KSPCommunityFixes/pull/257) [KSP 1.12.3 - 1.12.5]<br/>Various small performance patches (volume normalizer, eva module checks)
 - [**FasterPartFindTransform**](https://github.com/KSPModdingLibs/KSPCommunityFixes/pull/255) [KSP 1.12.3 - 1.12.5]<br/>Faster, and minimal GC alloc relacements for the Part FindModelTransform* and FindHeirarchyTransform* methods.
 
 #### API and modding tools