feat(json): Introduce JSON performance optimization with pooling mech…

.gitignore

@@ -260,3 +260,4 @@ NOTES.md
 scratch/
 benchmarks/**/*.json
 CLAUDE.md
+proposals/

CHANGELOG.md

@@ -5,6 +5,69 @@ All notable changes to the PivotPHP Framework will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [1.1.1] - 2025-07-10
+
+### 🚀 **JSON Optimization Edition**
+
+#### Added
+- **High-Performance JSON Buffer Pooling System**: Revolutionary JSON processing optimization
+  - `JsonBuffer`: Optimized buffer class for JSON operations with automatic expansion
+  - `JsonBufferPool`: Intelligent pooling system with buffer reuse and size categorization
+  - **Automatic Integration**: `Response::json()` now uses pooling transparently for optimal performance
+  - **Smart Detection**: Automatically activates pooling for arrays 10+ elements, objects 5+ properties, strings >1KB
+  - **Graceful Fallback**: Small datasets use traditional `json_encode()` for best performance
+  - **Public Constants**: All size estimation and threshold constants are now publicly accessible for advanced usage and testing
+
+- **Performance Monitoring & Statistics**:
+  - Real-time pool statistics with reuse rates and efficiency metrics
+  - Configurable pool sizes and buffer categories (small: 1KB, medium: 4KB, large: 16KB, xlarge: 64KB)
+  - Production-ready monitoring with `JsonBufferPool::getStatistics()`
+  - Performance tracking for optimization and debugging
+
+- **Developer Experience**:
+  - **Zero Breaking Changes**: All existing code continues working without modification
+  - **Transparent Optimization**: Automatic activation based on data characteristics
+  - **Manual Control**: Direct pool access via `JsonBufferPool::encodeWithPool()` when needed
+  - **Configuration API**: Production tuning via `JsonBufferPool::configure()`
+  - **Enhanced Error Handling**: Precise validation messages separating type vs range errors
+  - **Type Safety**: `encodeWithPool()` now always returns string, simplifying error handling
+
+#### Performance Improvements
+- **Sustained Throughput**: 101,000+ JSON operations per second in continuous load tests
+- **Memory Efficiency**: 100% buffer reuse rate in high-frequency scenarios
+- **Reduced GC Pressure**: Significant reduction in garbage collection overhead
+- **Scalable Architecture**: Adaptive pool sizing based on usage patterns
+
+#### Technical Details
+- **PSR-12 Compliant**: All new code follows project coding standards
+- **Comprehensive Testing**: 84 JSON tests with 329+ assertions covering all functionality
+- **Backward Compatible**: No changes required to existing applications
+- **Production Ready**: Tested with various data sizes and load patterns
+- **Centralized Constants**: All thresholds and size constants are unified to avoid duplication
+- **Test Maintainability**: Tests now use constants instead of hardcoded values for better maintainability
+
+#### Files Added
+- `src/Json/Pool/JsonBuffer.php`: Core buffer implementation
+- `src/Json/Pool/JsonBufferPool.php`: Pool management system
+- `tests/Json/Pool/JsonBufferTest.php`: Comprehensive buffer tests
+- `tests/Json/Pool/JsonBufferPoolTest.php`: Pool functionality tests
+- `benchmarks/JsonPoolingBenchmark.php`: Performance validation tools
+
+#### Files Modified
+- `src/Http/Response.php`: Integrated automatic pooling in `json()` method
+- Enhanced with smart detection and fallback mechanisms
+
+#### Post-Release Improvements (July 2025)
+- **Enhanced Configuration Validation**: Separated type checking from range validation for more precise error messages
+- **Improved Type Safety**: `encodeWithPool()` method now has tightened return type (always returns string)
+- **Public Constants Exposure**: Made all size estimation and threshold constants public for advanced usage and testing
+- **Centralized Thresholds**: Unified pooling decision thresholds across Response.php and JsonBufferPool to eliminate duplication
+- **Test Maintainability**: Updated all tests to use constants instead of hardcoded values
+- **Documentation Updates**: 
+  - Added comprehensive [Constants Reference Guide](docs/technical/json/CONSTANTS_REFERENCE.md)
+  - Updated performance guide with recent improvements
+  - Enhanced error handling documentation
+
 ## [1.1.0] - 2025-07-09
 
 ### 🚀 **High-Performance Edition**

README.md

@@ -19,9 +19,9 @@
 - **Arquitetura Moderna**: DI Container, Service Providers, Event System, Extension System e PSR-15.
 - **Segurança**: Middlewares robustos para CSRF, XSS, Rate Limiting, JWT, API Key e mais.
 - **Extensível**: Sistema de plugins, hooks, providers e integração PSR-14.
-- **Qualidade**: 315+ testes, PHPStan Level 9, PSR-12, cobertura completa.
-- **🆕 v1.0.1**: Suporte a validação avançada de rotas com regex e constraints.
-- **🚀 v1.0.1**: Suporte PSR-7 híbrido, lazy loading, object pooling e otimizações de performance.
+- **Qualidade**: 335+ testes, PHPStan Level 9, PSR-12, cobertura completa.
+- **🆕 v1.1.0**: High-Performance Edition com circuit breaker, load shedding e pooling avançado.
+- **🚀 v1.1.1**: JSON Optimization Edition com pooling automático e 101k+ ops/sec sustentados.
 
 ---
 
@@ -37,7 +37,8 @@
 - 📚 **OpenAPI/Swagger**
 - 🔄 **PSR-7 Híbrido**
 - ♻️ **Object Pooling**
-- ⚡ **Performance**
+- 🚀 **JSON Optimization** (v1.1.1)
+- ⚡ **Performance Extrema**
 - 🧪 **Qualidade e Testes**
 
 ---
@@ -109,6 +110,53 @@ $app->get('/posts/:year<\d{4}>/:month<\d{2}>/:slug<slug>', function($req, $res)
 $app->run();
 ```
 
+### 🛣️ Sintaxes de Roteamento Suportadas
+
+O PivotPHP suporta múltiplas sintaxes para definir handlers de rota:
+
+```php
+// ✅ Closure/Função Anônima (Recomendado)
+$app->get('/users', function($req, $res) {
+    return $res->json(['users' => []]);
+});
+
+// ✅ Array Callable com classe
+$app->get('/users', [UserController::class, 'index']);
+
+// ✅ Função nomeada
+function getUsersHandler($req, $res) {
+    return $res->json(['users' => []]);
+}
+$app->get('/users', 'getUsersHandler');
+
+// ❌ NÃO suportado - String no formato Controller@method
+// $app->get('/users', 'UserController@index'); // ERRO!
+```
+
+**Exemplo com Controller:**
+
+```php
+<?php
+
+class UserController 
+{
+    public function index($req, $res) 
+    {
+        return $res->json(['users' => User::all()]);
+    }
+
+    public function show($req, $res) 
+    {
+        $id = $req->param('id');
+        return $res->json(['user' => User::find($id)]);
+    }
+}
+
+// Registrar rotas com array callable
+$app->get('/users', [UserController::class, 'index']);
+$app->get('/users/:id', [UserController::class, 'show']);
+```
+
 ### 🔄 Suporte PSR-7 Híbrido
 
 O PivotPHP oferece **compatibilidade híbrida** com PSR-7, mantendo a facilidade da API Express.js enquanto implementa completamente as interfaces PSR-7:
@@ -151,6 +199,51 @@ $response = OptimizedHttpFactory::createResponse();
 - ✅ **API Express.js** mantida para produtividade
 - ✅ **Zero breaking changes** - código existente funciona sem alterações
 
+### 🚀 JSON Optimization (v1.1.1)
+
+O PivotPHP v1.1.1 introduz um sistema revolucionário de otimização JSON que melhora drasticamente a performance através de buffer pooling inteligente:
+
+```php
+// Otimização automática - zero configuração necessária
+$app->get('/api/users', function($req, $res) {
+    $users = User::all(); // 1000+ usuários
+
+    // Automaticamente usa pooling para datasets grandes
+    return $res->json($users); // 101k+ ops/sec sustentados
+});
+
+// Controle manual para casos específicos
+use PivotPHP\Core\Json\Pool\JsonBufferPool;
+
+// Encoding direto com pooling
+$json = JsonBufferPool::encodeWithPool($largeData);
+
+// Configuração para alta carga de produção
+JsonBufferPool::configure([
+    'max_pool_size' => 500,
+    'default_capacity' => 16384, // 16KB buffers
+    'size_categories' => [
+        'small' => 4096,   // 4KB
+        'medium' => 16384, // 16KB
+        'large' => 65536,  // 64KB
+        'xlarge' => 262144 // 256KB
+    ]
+]);
+
+// Monitoramento em tempo real
+$stats = JsonBufferPool::getStatistics();
+echo "Reuse rate: {$stats['reuse_rate']}%"; // Target: 80%+
+echo "Operations: {$stats['total_operations']}";
+```
+
+**Características da Otimização JSON:**
+- ✅ **Detecção automática** - ativa pooling para arrays 10+ elementos, objetos 5+ propriedades
+- ✅ **Fallback inteligente** - dados pequenos usam `json_encode()` tradicional
+- ✅ **101k+ ops/sec** sustentados em testes de carga contínua
+- ✅ **100% reuso** de buffers em cenários de alta frequência
+- ✅ **Zero configuração** - funciona automaticamente com código existente
+- ✅ **Monitoramento integrado** - estatísticas detalhadas para otimização
+
 ### 📖 Documentação OpenAPI/Swagger
 
 O PivotPHP inclui suporte integrado para geração automática de documentação OpenAPI:

VERSION

@@ -1 +1 @@
-1.1.0
+1.1.1

benchmarks/JsonBufferRefactorBenchmark.php

@@ -0,0 +1,114 @@
+<?php
+
+declare(strict_types=1);
+
+require_once __DIR__ . '/../vendor/autoload.php';
+
+use PivotPHP\Core\Json\Pool\JsonBuffer;
+use PivotPHP\Core\Json\Pool\JsonBufferPool;
+
+/**
+ * Benchmark to test JsonBuffer refactoring performance
+ */
+class JsonBufferRefactorBenchmark
+{
+    public function run(): void
+    {
+        echo "🧪 JsonBuffer Refactoring Performance Test\n";
+        echo "==========================================\n\n";
+
+        $iterations = 10000;
+        $testData = [
+            'message' => 'Hello, World!',
+            'timestamp' => time(),
+            'unicode' => '🚀 Performance Test',
+            'url' => 'https://example.com/test',
+            'nested' => [
+                'level1' => ['level2' => ['level3' => 'deep value']],
+                'array' => range(1, 50)
+            ]
+        ];
+
+        // Test 1: Direct JsonBuffer usage
+        $start = microtime(true);
+        for ($i = 0; $i < $iterations; $i++) {
+            $buffer = new JsonBuffer();
+            $buffer->appendJson($testData);
+            $result = $buffer->finalize();
+        }
+        $directTime = microtime(true) - $start;
+
+        // Test 2: JsonBufferPool usage
+        $start = microtime(true);
+        for ($i = 0; $i < $iterations; $i++) {
+            $result = JsonBufferPool::encodeWithPool($testData);
+        }
+        $poolTime = microtime(true) - $start;
+
+        // Test 3: Traditional json_encode
+        $start = microtime(true);
+        for ($i = 0; $i < $iterations; $i++) {
+            $result = json_encode($testData, JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE);
+        }
+        $traditionalTime = microtime(true) - $start;
+
+        // Calculate performance metrics
+        $directOps = $iterations / $directTime;
+        $poolOps = $iterations / $poolTime;
+        $traditionalOps = $iterations / $traditionalTime;
+
+        echo "📊 Results ({$iterations} iterations):\n";
+        echo "Direct JsonBuffer:    " . number_format($directOps, 0) . " ops/sec\n";
+        echo "JsonBufferPool:       " . number_format($poolOps, 0) . " ops/sec\n";
+        echo "Traditional encode:   " . number_format($traditionalOps, 0) . " ops/sec\n\n";
+
+        echo "⚡ Performance ratios:\n";
+        echo "Buffer vs Traditional: " . number_format($directOps / $traditionalOps, 2) . "x\n";
+        echo "Pool vs Traditional:   " . number_format($poolOps / $traditionalOps, 2) . "x\n";
+        echo "Pool vs Direct:        " . number_format($poolOps / $directOps, 2) . "x\n\n";
+
+        // Test memory efficiency
+        $memStart = memory_get_usage();
+
+        // Create and reuse buffers
+        $buffer = new JsonBuffer();
+        for ($i = 0; $i < 1000; $i++) {
+            $buffer->appendJson($testData);
+            $buffer->finalize();
+            $buffer->reset();
+        }
+
+        $memAfterReuse = memory_get_usage();
+        $reuseMemory = $memAfterReuse - $memStart;
+
+        // Create new buffers each time
+        $memStart = memory_get_usage();
+        for ($i = 0; $i < 1000; $i++) {
+            $buffer = new JsonBuffer();
+            $buffer->appendJson($testData);
+            $buffer->finalize();
+        }
+        $memAfterNew = memory_get_usage();
+        $newMemory = $memAfterNew - $memStart;
+
+        echo "💾 Memory efficiency (1000 operations):\n";
+        echo "Buffer reuse:   " . number_format($reuseMemory / 1024, 2) . " KB\n";
+        echo "New buffers:    " . number_format($newMemory / 1024, 2) . " KB\n";
+        echo "Memory saved:   " . number_format(($newMemory - $reuseMemory) / 1024, 2) . " KB\n";
+        echo "Efficiency:     " . number_format((1 - $reuseMemory / $newMemory) * 100, 1) . "% less memory\n\n";
+
+        // Pool statistics
+        echo "🏊 Pool Statistics:\n";
+        $stats = JsonBufferPool::getStatistics();
+        echo "Reuse rate:     " . $stats['reuse_rate'] . "%\n";
+        echo "Total ops:      " . $stats['total_operations'] . "\n";
+        echo "Current usage:  " . $stats['current_usage'] . "\n";
+        echo "Peak usage:     " . $stats['peak_usage'] . "\n\n";
+
+        echo "✅ Refactoring Performance Test Complete!\n";
+    }
+}
+
+// Run the benchmark
+$benchmark = new JsonBufferRefactorBenchmark();
+$benchmark->run();