From cac291df476e0ab1932c2078610e988500f27e31 Mon Sep 17 00:00:00 2001
From: embeddedt <42941056+embeddedt@users.noreply.github.com>
Date: Wed, 9 Aug 2023 19:51:59 -0400
Subject: [PATCH] Add minor Brigadier patch to limit suggestion count to 10000

Fixes lag when there are many items registered
---
 .../SuggestionsBuilderMixin.java              | 30 +++++++++++++++++++
 1 file changed, 30 insertions(+)
 create mode 100644 fabric/src/main/java/org/embeddedt/modernfix/fabric/mixin/perf/faster_command_suggestions/SuggestionsBuilderMixin.java

diff --git a/fabric/src/main/java/org/embeddedt/modernfix/fabric/mixin/perf/faster_command_suggestions/SuggestionsBuilderMixin.java b/fabric/src/main/java/org/embeddedt/modernfix/fabric/mixin/perf/faster_command_suggestions/SuggestionsBuilderMixin.java
new file mode 100644
index 00000000..e27b0480
--- /dev/null
+++ b/fabric/src/main/java/org/embeddedt/modernfix/fabric/mixin/perf/faster_command_suggestions/SuggestionsBuilderMixin.java
@@ -0,0 +1,30 @@
+package org.embeddedt.modernfix.fabric.mixin.perf.faster_command_suggestions;
+
+import com.mojang.brigadier.suggestion.Suggestion;
+import com.mojang.brigadier.suggestion.SuggestionsBuilder;
+import org.spongepowered.asm.mixin.*;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Redirect;
+
+import java.util.List;
+
+/**
+ * Simple hack-fix to limit the number of suggestions being processed. Not a perfect fix but mitigates lag decently
+ * on an i3-4150.
+ */
+@Mixin(SuggestionsBuilder.class)
+public class SuggestionsBuilderMixin {
+    @Unique
+    private static final int MAX_SUGGESTIONS = 10000;
+
+    @Shadow @Final @Mutable
+    private List<Suggestion> result;
+
+    @Redirect(method = "*", at = @At(value = "INVOKE", target = "Ljava/util/List;add(Ljava/lang/Object;)Z"), require = 0)
+    private <T> boolean addIfFits(List<T> list, T entry) {
+        if(list != result || list.size() < MAX_SUGGESTIONS) {
+            return list.add(entry);
+        }
+        return false;
+    }
+}