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Phase 2: Performance Profiling Setup - Add profiling utilities
- Add StartupProfiler: Measure cold/warm start times - Add VideoProfiler: Profile video load, playback metrics - Add MemoryProfiler: Detect memory leaks, monitor heap growth - Add HiveEncryptionBenchmark: Measure encryption overhead - Add PHASE_2_PROFILING_PLAN.md: Complete testing procedures Ready for profiling execution once Flutter SDK is initialized
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import 'dart:async';
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import 'package:flutter/foundation.dart';
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import 'package:hive/hive.dart';
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/// Benchmark for Hive encryption performance impact
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class HiveEncryptionBenchmark {
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static final _results = <String, EncryptionBenchmarkResult>[];
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/// Run encryption overhead benchmark
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static Future<void> runBenchmark({
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int writeCount = 1000,
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int readCount = 1000,
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String valueSize = 'medium', // small, medium, large
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}) async {
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if (kDebugMode) {
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print('\n' + ('=' * 60));
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print('🔐 HIVE ENCRYPTION BENCHMARK');
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print('=' * 60);
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print('Write Operations: $writeCount');
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print('Read Operations: $readCount');
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print('Value Size: $valueSize');
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print('=' * 60 + '\n');
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}
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// Generate test data
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final testValue = _generateTestValue(valueSize);
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try {
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// Scenario 1: Unencrypted writes & reads
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await _benchmarkUnencrypted(writeCount, readCount, testValue);
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// Scenario 2: Encrypted writes & reads
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await _benchmarkEncrypted(writeCount, readCount, testValue);
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// Print comparison
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_printComparison();
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} catch (e) {
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if (kDebugMode) {
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print('❌ Benchmark error: $e');
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}
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}
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}
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static Future<void> _benchmarkUnencrypted(
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int writes, int reads, String testValue) async {
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const boxName = 'benchmark_unencrypted';
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try {
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// Clean up if exists
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if (Hive.isBoxOpen(boxName)) {
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await Hive.box(boxName).deleteFromDisk();
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}
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final box = await Hive.openBox<String>(boxName);
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// Write benchmark
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final writeStop = Stopwatch()..start();
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for (int i = 0; i < writes; i++) {
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await box.put('key_$i', testValue);
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}
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writeStop.stop();
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// Read benchmark
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final readStop = Stopwatch()..start();
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for (int i = 0; i < reads; i++) {
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await box.get('key_${i % writes}');
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}
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readStop.stop();
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// Delete benchmark
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final deleteStop = Stopwatch()..start();
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await box.deleteFromDisk();
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deleteStop.stop();
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final result = EncryptionBenchmarkResult(
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name: 'Unencrypted (Hive)',
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writeTimeMs: writeStop.elapsedMilliseconds,
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readTimeMs: readStop.elapsedMilliseconds,
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deleteTimeMs: deleteStop.elapsedMilliseconds,
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operationCount: writes,
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);
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_results.add(result);
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if (kDebugMode) {
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print('\n📝 UNENCRYPTED RESULTS:');
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result.print();
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}
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} catch (e) {
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if (kDebugMode) {
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print('❌ Unencrypted benchmark failed: $e');
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}
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}
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}
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static Future<void> _benchmarkEncrypted(
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int writes, int reads, String testValue) async {
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const boxName = 'benchmark_encrypted';
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try {
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// Clean up if exists
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if (Hive.isBoxOpen(boxName)) {
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await Hive.box(boxName).deleteFromDisk();
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}
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final encryptionKey = Hive.generateSecureKey();
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final box = await Hive.openBox<String>(
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boxName,
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encryptionCipher: HiveAesCipher(encryptionKey),
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);
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// Write benchmark
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final writeStop = Stopwatch()..start();
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for (int i = 0; i < writes; i++) {
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await box.put('key_$i', testValue);
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}
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writeStop.stop();
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// Read benchmark
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final readStop = Stopwatch()..start();
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for (int i = 0; i < reads; i++) {
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await box.get('key_${i % writes}');
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}
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readStop.stop();
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// Delete benchmark
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final deleteStop = Stopwatch()..start();
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await box.deleteFromDisk();
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deleteStop.stop();
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final result = EncryptionBenchmarkResult(
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name: 'Encrypted (AES-256)',
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writeTimeMs: writeStop.elapsedMilliseconds,
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readTimeMs: readStop.elapsedMilliseconds,
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deleteTimeMs: deleteStop.elapsedMilliseconds,
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operationCount: writes,
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);
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_results.add(result);
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if (kDebugMode) {
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print('\n🔐 ENCRYPTED RESULTS:');
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result.print();
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}
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} catch (e) {
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if (kDebugMode) {
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print('❌ Encrypted benchmark failed: $e');
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}
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}
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}
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static void _printComparison() {
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if (_results.length >= 2) {
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final unenc = _results[0];
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final enc = _results[1];
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final writeOverhead = ((enc.writeTimeMs / unenc.writeTimeMs - 1) * 100);
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final readOverhead = ((enc.readTimeMs / unenc.readTimeMs - 1) * 100);
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if (kDebugMode) {
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print('\n' + ('=' * 60));
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print('📊 PERFORMANCE COMPARISON');
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print('=' * 60);
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print('\nWrite Performance:');
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print(
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' Unencrypted: ${unenc.writeTimeMs}ms (${(unenc.writeTimeMs / unenc.operationCount).toStringAsFixed(2)}µs/op)');
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print(
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' Encrypted: ${enc.writeTimeMs}ms (${(enc.writeTimeMs / enc.operationCount).toStringAsFixed(2)}µs/op)');
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print(' Overhead: ${writeOverhead.toStringAsFixed(1)}%');
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print('\nRead Performance:');
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print(
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' Unencrypted: ${unenc.readTimeMs}ms (${(unenc.readTimeMs / unenc.operationCount).toStringAsFixed(2)}µs/op)');
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print(
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' Encrypted: ${enc.readTimeMs}ms (${(enc.readTimeMs / enc.operationCount).toStringAsFixed(2)}µs/op)');
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print(' Overhead: ${readOverhead.toStringAsFixed(1)}%');
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// Status
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const acceptableThreshold = 25.0;
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final writeStatus = writeOverhead > acceptableThreshold ? '⚠️' : '✅';
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final readStatus = readOverhead > acceptableThreshold ? '⚠️' : '✅';
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print('\nStatus:');
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print(' $writeStatus Write overhead: ${writeOverhead.toStringAsFixed(1)}% (target: <$acceptableThreshold%)');
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print(' $readStatus Read overhead: ${readOverhead.toStringAsFixed(1)}% (target: <$acceptableThreshold%)');
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print('=' * 60 + '\n');
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}
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}
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}
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static String _generateTestValue(String size) {
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final base = 'test_value_' * 10;
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switch (size) {
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case 'small':
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return base;
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case 'large':
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return base * 100;
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default:
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return base * 10;
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}
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}
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static List<Map<String, dynamic>> toJson() {
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return _results.map((r) => r.toJson()).toList();
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}
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static void reset() {
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_results.clear();
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}
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}
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/// Result of a single benchmark run
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class EncryptionBenchmarkResult {
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final String name;
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final int writeTimeMs;
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final int readTimeMs;
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final int deleteTimeMs;
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final int operationCount;
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EncryptionBenchmarkResult({
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required this.name,
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required this.writeTimeMs,
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required this.readTimeMs,
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required this.deleteTimeMs,
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required this.operationCount,
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});
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double get writePerOpUs => (writeTimeMs * 1000.0) / operationCount;
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double get readPerOpUs => (readTimeMs * 1000.0) / operationCount;
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void print() {
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print(' Name: $name');
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print(' Write: ${writeTimeMs}ms (${writePerOpUs.toStringAsFixed(2)}µs/op)');
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print(' Read: ${readTimeMs}ms (${readPerOpUs.toStringAsFixed(2)}µs/op)');
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print(' Delete: ${deleteTimeMs}ms');
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}
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Map<String, dynamic> toJson() {
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return {
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'name': name,
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'writeTimeMs': writeTimeMs,
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'readTimeMs': readTimeMs,
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'deleteTimeMs': deleteTimeMs,
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'operationCount': operationCount,
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'writePerOpUs': writePerOpUs,
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'readPerOpUs': readPerOpUs,
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};
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}
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}
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