From 756e6cfe5f9bbee5c93c4284ddbd817d6f63fe0f Mon Sep 17 00:00:00 2001
From: sunkaixuan <610262374@qq.com>
Date: Mon, 13 Jan 2025 13:43:14 +0800
Subject: [PATCH] Performance optimization

---
 .../Abstract/FastestProvider/FastBuilder.cs       | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/Src/Asp.Net/SqlSugar/Abstract/FastestProvider/FastBuilder.cs b/Src/Asp.Net/SqlSugar/Abstract/FastestProvider/FastBuilder.cs
index 39c439407..0ffcae663 100644
--- a/Src/Asp.Net/SqlSugar/Abstract/FastestProvider/FastBuilder.cs
+++ b/Src/Asp.Net/SqlSugar/Abstract/FastestProvider/FastBuilder.cs
@@ -51,7 +51,20 @@ namespace SqlSugar
         public async virtual Task<int> Merge<T>(string tableName,DataTable dt, EntityInfo entityInfo, string[] whereColumns, string[] updateColumns, List<T> datas) where T : class, new()
         {
             var result = 0;
-            await this.Context.Utilities.PageEachAsync(datas,2000,async pageItems =>
+            var pageSize = 2000;
+            if (dt.Columns.Count > 100) 
+            {
+                pageSize = 100;
+            }
+            else if (dt.Columns.Count > 50)
+            {
+                pageSize = 300;
+            }
+            else if (dt.Columns.Count > 30)
+            {
+                pageSize = 500;
+            }
+            await this.Context.Utilities.PageEachAsync(datas, pageSize, async pageItems =>
             {
                 var x = await this.Context.Storageable(pageItems).As(tableName).WhereColumns(whereColumns).ToStorageAsync();
                 result += await x.BulkCopyAsync();