Update sanitize method to only call replaceAll if needed - save a ton of memory allocations (gigs) & runtime (~10%) in big exports.

qqq-backend-core/src/main/java/com/kingsrook/qqq/backend/core/adapters/QRecordToCsvAdapter.java

@@ -80,8 +80,23 @@ public class QRecordToCsvAdapter
    /*******************************************************************************
     ** todo - kinda weak... can we find this in a CSV lib??
     *******************************************************************************/
-   private String sanitize(String value)
+   static String sanitize(String value)
    {
-      return (value.replaceAll("\"", "\"\"").replaceAll("\n", " "));
+      /////////////////////////////////////////////////////////////////////////////////////
+      // especially in big exports, we see a TON of memory allocated and CPU spent here, //
+      // if we just blindly replaceAll.  So, only do it if needed.                       //
+      /////////////////////////////////////////////////////////////////////////////////////
+      if(value.contains("\""))
+      {
+         value = value.replaceAll("\"", "\"\"");
+      }
+
+      if(value.contains("\n"))
+      {
+         value = value.replaceAll("\n", " ");
+      }
+
+      return (value);
    }
+
 }

qqq-backend-core/src/test/java/com/kingsrook/qqq/backend/core/adapters/QRecordToCsvAdapterTest.java

@@ -0,0 +1,63 @@
+/*
+ * QQQ - Low-code Application Framework for Engineers.
+ * Copyright (C) 2021-2023.  Kingsrook, LLC
+ * 651 N Broad St Ste 205 # 6917 | Middletown DE 19709 | United States
+ * contact@kingsrook.com
+ * https://github.com/Kingsrook/
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.kingsrook.qqq.backend.core.adapters;
+
+
+import com.kingsrook.qqq.backend.core.BaseTest;
+import org.junit.jupiter.api.Test;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+
+/*******************************************************************************
+ ** Unit test for QRecordToCsvAdapter 
+ *******************************************************************************/
+class QRecordToCsvAdapterTest extends BaseTest
+{
+
+   /*******************************************************************************
+    **
+    *******************************************************************************/
+   @Test
+   void testSanitize()
+   {
+      assertEquals("foo", QRecordToCsvAdapter.sanitize("foo"));
+
+      assertEquals("""
+         Homer ""Jay"" Simpson""", QRecordToCsvAdapter.sanitize("""
+         Homer "Jay" Simpson"""));
+
+      assertEquals("""
+         one ""quote"" two ""quotes"".""", QRecordToCsvAdapter.sanitize("""
+         one "quote" two "quotes"."""));
+
+      assertEquals("""
+         new line""", QRecordToCsvAdapter.sanitize("""
+         new
+         line"""));
+
+      assertEquals("""
+         end ""quote"" new line""", QRecordToCsvAdapter.sanitize("""
+         end "quote" new
+         line"""));
+   }
+
+}