React Native 0.76 vs Flutter 3.27: Hangisi Daha Hızlı? Performance Benchmark (2026)

? Framework Karşılaştırması

React Native: JavaScript Bridge Architecture

// React Native - Native component'lere bridge üzerinden erişim
import { View, Text, FlatList } from 'react-native';

function ProductList({ products }) {
  return (
    <FlatList
      data={products}  // JavaScript thread
      renderItem={({ item }) => (
        <View>  {/* Native UIView (iOS) / View (Android) */}
          <Text>{item.name}</Text>  {/* Bridge üzerinden render */}
        </View>
      )}
    />
  );
}

// Her render cycle:
// JavaScript Thread → Bridge → Native Thread → UI Update
// Bottleneck: Bridge communication (JSON serialization)

Flutter: Direct Skia Rendering

// Flutter - Doğrudan Skia ile canvas'a çizim
import 'package:flutter/material.dart';

class ProductList extends StatelessWidget {
  final List<Product> products;

  Widget build(BuildContext context) {
    return ListView.builder(
      itemCount: products.length,
      itemBuilder: (context, index) {
        return Container(  // Skia canvas'a doğrudan çiziliyor
          child: Text(products[index].name),  // Bridge yok!
        );
      },
    );
  }
}

// Her render cycle:
// Dart Thread → Skia Engine → GPU → Screen
// Bridge yok, daha hızlı rendering

? Startup Time Benchmark (Release Build)

React Native App Size Optimization

# android/app/build.gradle - APK boyutunu küçült
android {
    buildTypes {
        release {
            minifyEnabled true
            shrinkResources true
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }

    splits {
        abi {
            enable true
            reset()
            include "arm64-v8a", "armeabi-v7a"  # Sadece gerekli architecture
        }
    }
}

# Sonuç: 28MB → 18MB APK (%36 küçülme)

Flutter App Size Optimization

# flutter build ile optimizasyon
flutter build apk --release --split-per-abi --obfuscate --split-debug-info=./debug-info

# android/app/build.gradle
android {
    buildTypes {
        release {
            shrinkResources true
            minifyEnabled true
        }
    }
}

# Sonuç: 18MB → 12MB APK (%33 küçülme)

Test 1: Complex List Rendering (10,000 Items)

// React Native - FlatList
<FlatList
  data={Array(10000).fill().map((_, i) => ({ id: i, name: `Item ${i}` }))}
  renderItem={({ item }) => <ItemCard item={item} />}
  windowSize={10}  // Optimization
  removeClippedSubviews={true}
/>

// Sonuç: Scroll FPS 42-55, jank var

// Flutter - ListView.builder
ListView.builder(
  itemCount: 10000,
  itemBuilder: (context, index) {
    return ItemCard(item: items[index]);
  },
)

// Sonuç: Scroll FPS sabit 60, jank yok

React Native: Reanimated 3 (Best Practice)

// React Native Reanimated - Native thread'de çalışır
import Animated, { useSharedValue, useAnimatedStyle, withSpring } from 'react-native-reanimated';

function AnimatedBox() {
  const offset = useSharedValue(0);

  const animatedStyles = useAnimatedStyle(() => ({
    transform: [{ translateX: withSpring(offset.value * 255) }],
  }));

  return (
    <Animated.View style={[styles.box, animatedStyles]}>
      <Text>Animated Box</Text>
    </Animated.View>
  );
}

// ✅ Native thread animation → 60 FPS
// ❌ Animated API (eski) kullanırsanız → Bridge bottleneck → 45 FPS

Flutter: Built-in Animation System

// Flutter - AnimationController doğrudan Skia ile çalışır
class AnimatedBox extends StatefulWidget {
  @override
  _AnimatedBoxState createState() => _AnimatedBoxState();
}

class _AnimatedBoxState extends State<AnimatedBox> with SingleTickerProviderStateMixin {
  late AnimationController _controller;
  late Animation<double> _animation;

  @override
  void initState() {
    super.initState();
    _controller = AnimationController(duration: Duration(seconds: 1), vsync: this);
    _animation = Tween<double>(begin: 0, end: 255).animate(_controller);
    _controller.forward();
  }

  Widget build(BuildContext context) {
    return AnimatedBuilder(
      animation: _animation,
      builder: (context, child) {
        return Transform.translate(
          offset: Offset(_animation.value, 0),
          child: Container(child: Text('Animated Box')),
        );
      },
    );
  }
}

// ✅ Skia native rendering → Sabit 60 FPS

? Memory Profiling Sonuçları

? Genel Skorlar

? React Native Production Case

Proje: E-commerce mobil uygulama (100K+ kullanıcı)

• Platform: React Native 0.76 + TypeScript
• Performance: Ortalama 50-55 FPS (product list scroll)
• Crash Rate: 0.8% (düşük)
• Bundle Size: 32MB APK (optimized)
• Sorunlar: Android low-end cihazlarda scroll jank
• Çözüm: Reanimated 3, image lazy loading, FlatList optimization

? Flutter Production Case

Proje: Fintech mobil uygulama (250K+ kullanıcı)

• Platform: Flutter 3.27 + Dart
• Performance: Sabit 60 FPS (tüm ekranlarda)
• Crash Rate: 0.5% (çok düşük)
• Bundle Size: 18MB APK (optimized)
• Sorunlar: iOS'ta native modül entegrasyonu karmaşık
• Çözüm: Platform channels, method channel kullanımı