performance! compute LookupElement hashCode

Author: tangzx

src/main/java/com/tang/intellij/lua/editor/completion/LookupElement.kt

@@ -102,7 +102,7 @@ class LuaFieldLookupElement(val fieldName: String, val field: LuaClassField, bol
 
 class TyFunctionLookupElement(name: String,
                               val psi: LuaPsiElement,
-                              signature: IFunSignature,
+                              private val signature: IFunSignature,
                               bold: Boolean,
                               colonStyle: Boolean,
                               val ty: ITyFunction,
@@ -133,6 +133,10 @@ class TyFunctionLookupElement(name: String,
 
     override fun getItemText() = lazyItemText
 
+    override fun hashCode(): Int {
+        return super.hashCode() * 31 * (signature.params.size + 1)
+    }
+
     /**
      * https://github.com/tangzx/IntelliJ-EmmyLua/issues/54
      */

src/main/java/com/tang/intellij/lua/editor/completion/LuaLookupElement.java

@@ -162,7 +162,7 @@ public int compareTo(@NotNull final LookupElement o) {
     public boolean equals(Object obj) {
         if (obj instanceof LuaLookupElement) {
             LuaLookupElement element = (LuaLookupElement) obj;
-            return element.getItemText().equals(getItemText());
+            return element.hashCode() == hashCode();
         }
         return super.equals(obj);
     }