From c8b963d05113221d91516e93604b23498fbb45d9 Mon Sep 17 00:00:00 2001
From: Asriel Camora <asriel@camora.dev>
Date: Sat, 11 Nov 2023 23:58:46 -0800
Subject: [PATCH] Memory optimization stuff

---
 Simulator/SimulationState.cs | 11 +----------
 Solver/NodeScoresBuffer.cs   | 13 +++++++------
 2 files changed, 8 insertions(+), 16 deletions(-)

diff --git a/Simulator/SimulationState.cs b/Simulator/SimulationState.cs
index 74cac04..8147cdb 100644
--- a/Simulator/SimulationState.cs
+++ b/Simulator/SimulationState.cs
@@ -18,7 +18,7 @@ public record struct SimulationState
     public ActionStates ActionStates;
 
     // https://github.com/ffxiv-teamcraft/simulator/blob/0682dfa76043ff4ccb38832c184d046ceaff0733/src/model/tables.ts#L2
-    private static readonly int[] HQPercentTable = {
+    private static ReadOnlySpan<int> HQPercentTable => new[] {
         1, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 6, 6, 6, 6, 7, 7, 7, 7, 8, 8, 8,
         9, 9, 9, 10, 10, 10, 11, 11, 11, 12, 12, 12, 13, 13, 13, 14, 14, 14, 15, 15, 15, 16, 16, 17, 17,
         17, 18, 18, 18, 19, 19, 20, 20, 21, 22, 23, 24, 26, 28, 31, 34, 38, 42, 47, 52, 58, 64, 68, 71,
@@ -44,13 +44,4 @@ public record struct SimulationState
         ActionCount = 0;
         ActionStates = new();
     }
-
-#if IS_DETERMINISTIC
-    public override readonly string ToString()
-    {
-        var b = new System.Text.StringBuilder();
-        PrintMembers(b);
-        return Convert.ToHexString(System.Security.Cryptography.SHA256.HashData(System.Text.Encoding.UTF8.GetBytes(b.ToString())));
-    }
-#endif
 }
diff --git a/Solver/NodeScoresBuffer.cs b/Solver/NodeScoresBuffer.cs
index fecfb40..5d45e59 100644
--- a/Solver/NodeScoresBuffer.cs
+++ b/Solver/NodeScoresBuffer.cs
@@ -7,11 +7,11 @@ namespace Craftimizer.Solver;
 // Adapted from https://github.com/dtao/ConcurrentList/blob/4fcf1c76e93021a41af5abb2d61a63caeba2adad/ConcurrentList/ConcurrentList.cs
 public struct NodeScoresBuffer
 {
-    public sealed class ScoresBatch
+    public readonly struct ScoresBatch
     {
-        public Memory<float> ScoreSum;
-        public Memory<float> MaxScore;
-        public Memory<int> Visits;
+        public readonly Memory<float> ScoreSum;
+        public readonly Memory<float> MaxScore;
+        public readonly Memory<int> Visits;
 
         public ScoresBatch()
         {
@@ -40,9 +40,10 @@ public struct NodeScoresBuffer
 
         var idx = Count++;
 
-        var (arrayIdx, _) = GetArrayIndex(idx);
+        var (arrayIdx, subIdx) = GetArrayIndex(idx);
 
-        Data[arrayIdx] ??= new();
+        if (subIdx == 0)
+            Data[arrayIdx] = new();
     }
 
     public readonly void Visit((int arrayIdx, int subIdx) at, float score)