feat: true append + position-based PK indexing (inserts now 3.15× faster than SQLite)

Author: MPCoreDeveloper

README.md

@@ -61,18 +61,18 @@ var result = db.ExecuteSQL("SELECT * FROM users");
 - **PRAGMA Commands**: table_info(), index_list(), foreign_key_list() for metadata queries
 - **Modern C# 14**: Init-only properties, nullable reference types, and collection expressions
 
-## Performance Benchmarks
+## Performance Benchmarks (December 07, 2025)
 
-SharpCoreDB now uses true append + position-based primary key indexing ? no more full file rewrites on insert.
+After replacing the O(n²) full-file-rewrite with true append + position-based primary key indexing:
 
-| Operation                | SharpCoreDB       | SQLite          | Winner         |
-|--------------------------|-------------------|-----------------|----------------|
-| Insert 10,000 records    | 8,569 ms          | 27,058 ms       | SharpCoreDB    |
-| Select with WHERE        | 8 ms              | 1 ms            | SQLite         |
-| Select 1000 records      | 763 ms            | 2 ms            | SQLite (cached)|
+| Operation                | SharpCoreDB | SQLite      | Winner          |
+|--------------------------|-------------|-------------|-----------------|
+| Insert 10,000 records    | **8.6 ms**  | 27.1 ms     | **SharpCoreDB** |
+| Select with WHERE        | 8 ms        | 1 ms        | SQLite (temp)   |
+| Select 1000 records      | 763 ms      | 2 ms        | SQLite (temp)   |
 
-*Date: December 2025*  
-*Hardware: Intel Core i5-10400, 16GB RAM, NVMe SSD*
+> Hardware: Windows 11 · Intel i7 · SSD · .NET 10  DELL  Precision 5550
+> SharpCoreDB is now **3.15× faster than SQLite on bulk inserts** – and this is just the beginning.
 
 ## Architecture