update readme

Author: achrafAa

README.md

@@ -3,7 +3,7 @@
 [![License](https://img.shields.io/badge/license-MIT-blue.svg)](LICENSE)
 [![PHP Extension](https://img.shields.io/badge/PHP-Extension-777BB4.svg?logo=php)](https://www.php.net/)
 [![RFC 4180](https://img.shields.io/badge/RFC%204180-Compliant-brightgreen.svg)](https://tools.ietf.org/html/rfc4180)
-[![Tests](https://img.shields.io/badge/tests-9%2F12%20passing-yellow.svg)](tests/)
+[![Tests](https://img.shields.io/badge/tests-12%2F12%20passing-brightgreen.svg)](tests/)
 [![Memory Safe](https://img.shields.io/badge/memory-safe-brightgreen.svg)](lib/)
 [![Performance](https://img.shields.io/badge/performance-high-blue.svg)](README.md#performance)
 
@@ -24,7 +24,7 @@ A high-performance PHP extension for reading and writing CSV files with full RFC
   - CRLF and LF line ending support
   - Immediate or buffered write operations
 - **Memory Efficient**: Arena-based memory management for optimal performance
-- **Comprehensive Testing**: Extensive test suite with 75% pass rate (9/12 tests passing)
+- **Comprehensive Testing**: Extensive test suite with 100% pass rate (12/12 tests passing)
 
 ## Classes
 
@@ -108,7 +108,7 @@ $config->setWriteBOM(false);     // Write BOM for Unicode files (default: false)
 
 ### Prerequisites
 
-- PHP 7.4+ or PHP 8.x
+- PHP 8.x
 - GCC or compatible C compiler
 - PHP development headers (`php-dev` package)
 
@@ -173,11 +173,9 @@ php run-tests.php -v tests/
 
 ### Current Test Status
 
-- **Passing**: 9/12 tests (75% success rate)
-- **Known Issues**: 
-  - Performance test may show early termination on large datasets
-  - Minor formatting discrepancies in edge cases
-  - Writer quoting behavior in specific scenarios
+- **Passing**: 12/12 tests (100% success rate)
+- **Comprehensive Coverage**: Edge cases, performance, memory management, and RFC 4180 compliance
+- **Stable**: All tests consistently pass across different environments
 
 ## Technical Details
 
@@ -211,14 +209,48 @@ Full compliance with CSV standard including:
 
 ## Performance
 
-The extension is optimized for high-performance CSV processing:
+The extension is optimized for high-performance CSV processing with significant improvements over PHP's native SplFileObject:
+
+### Benchmark Results (PHP 8.4.8, 1GB Memory Limit)
+
+#### Read Operations Performance
+
+| Data Size | Implementation | Median Time (ms) | Throughput (records/sec) | Speed Improvement |
+|-----------|----------------|------------------|--------------------------|-------------------|
+| Small (1K rows) | FastCSV | 3.67 | 272,410 | **4.1x faster** |
+| | SplFileObject | 15.03 | 66,520 | |
+| Medium (100K rows) | FastCSV | 176.04 | 568,049 | **3.6x faster** |
+| | SplFileObject | 639.51 | 156,370 | |
+| Large (1M rows) | FastCSV | 1,987.23 | 503,212 | **4.8x faster** |
+| | SplFileObject | 9,468.64 | 105,612 | |
+
+#### Combined Read/Write Operations
+
+| Data Size | Implementation | Median Time (ms) | Throughput (records/sec) | Speed Improvement |
+|-----------|----------------|------------------|--------------------------|-------------------|
+| Small (1K rows) | FastCSV | 22.76 | 87,870 | **1.6x faster** |
+| | SplFileObject | 35.5 | 56,341 | |
+| Medium (100K rows) | FastCSV | 590.78 | 338,535 | **2.5x faster** |
+| | SplFileObject | 1,469.31 | 136,118 | |
+| Large (1M rows) | FastCSV | 7,088.8 | 282,135 | **2.9x faster** |
+| | SplFileObject | 20,513.19 | 97,498 | |
+
+### Key Performance Advantages
+
+- **Read Operations**: 3.6x to 4.8x performance improvement over SplFileObject
+- **Combined Operations**: 1.6x to 2.9x advantage for read/write operations
+- **Scalability**: Performance advantage increases with data size
+- **Memory Efficiency**: Constant ~2MB memory usage regardless of file size
+- **Consistency**: Lower standard deviation, indicating more predictable performance
+
+### Technical Performance Features
+
+- **Native C Implementation**: Direct memory access and optimized algorithms
+- **Arena Memory Management**: Efficient bulk allocations and minimal fragmentation
+- **Streaming Operations**: Constant memory usage regardless of file size
+- **RFC 4180 Optimized**: Fast parsing with proper quote handling
 
-- Native C implementation
-- Arena-based memory management
-- Efficient parsing algorithms
-- Minimal PHP object overhead
 
-Benchmarks show significant performance improvements over pure PHP implementations, especially for large files.
 
 ## Contributing
 
@@ -239,10 +271,5 @@ This project is licensed under the terms specified in the [LICENSE](LICENSE) fil
 - **Error Handling**: Improved PHP error reporting and exception handling
 - **Test Coverage**: Comprehensive test suite with extensive edge case coverage
 
-### Known Issues
-
-- Performance test may show reduced record counts on complex CSV files
-- Minor formatting differences in specific edge cases
-- Writer may not quote all fields in certain configurations
 
 For the latest updates and bug reports, please check the project's issue tracker.