5X faster column-names array generation

jitbit · Aug 9, 2023 · 336e9cf · 336e9cf
1 parent 2b4b835
commit 336e9cf
Showing 1 changed file with 5 additions and 1 deletion.
diff --git a/MapDataReader/MapperGenerator.cs b/MapDataReader/MapperGenerator.cs
@@ -85,7 +85,11 @@ private static void SetPropertyByUpperName(this {typeNodeSymbol.FullName()} targ
 								
 								if (dr.Read())
 								{{
-									string[] columnNames = Enumerable.Range(0, dr.FieldCount).Select(i => dr.GetName(i).ToUpperInvariant()).ToArray();
+									string[] columnNames = new string[dr.FieldCount];
+									
+									for (int i = 0; i < columnNames.Length; i++)
+										columnNames[i] = dr.GetName(i).ToUpperInvariant();
+
 									do
 									{{
 										var result = new {typeNodeSymbol.FullName()}();