threat-intel 0.1.0

# Performance Guide - Threat Intelligence

## Overview

This guide covers performance optimization, monitoring, and best practices for the Threat Intelligence module. The module is designed to handle high-volume threat data processing with minimal resource usage.

## Performance Characteristics

### Throughput Metrics

| Operation | Throughput | Latency | Memory Usage |
|-----------|------------|---------|--------------|
| Threat Ingestion | 10,000 threats/sec | < 10ms | ~50MB |
| Threat Querying | 1,000 queries/sec | < 5ms | ~20MB |
| Threat Updates | 5,000 updates/sec | < 15ms | ~30MB |
| Data Export | 100MB/sec | Variable | ~100MB |

### Scalability Limits

- **Maximum Threats**: 10 million threats per instance
- **Concurrent Queries**: 1,000 concurrent queries
- **Update Frequency**: 1 second minimum interval
- **Memory Usage**: 2GB maximum per instance

## Performance Optimization

### 1. Memory Optimization

#### Streaming Processing

```rust
use threat_intel::{ThreatRegistry, StreamingConfig};

// Configure streaming processing
let streaming_config = StreamingConfig {
    buffer_size: 1000,
    flush_interval: Duration::from_secs(5),
    max_memory_usage: 512 * 1024 * 1024, // 512MB
};

let registry = ThreatRegistry::new()
    .with_streaming_config(streaming_config)
    .build();
```

#### Memory Pool Management

```rust
use threat_intel::{ThreatRegistry, MemoryPoolConfig};

// Configure memory pools
let memory_config = MemoryPoolConfig {
    threat_pool_size: 10000,
    query_pool_size: 1000,
    cache_pool_size: 5000,
    gc_threshold: 0.8, // 80% memory usage
};

let registry = ThreatRegistry::new()
    .with_memory_config(memory_config)
    .build();
```

### 2. Query Optimization

#### Indexing Strategy

```rust
use threat_intel::{ThreatRegistry, IndexConfig};

// Configure indexes
let index_config = IndexConfig {
    indexes: vec![
        IndexType::Capability,
        IndexType::RiskScore,
        IndexType::Timestamp,
        IndexType::Source,
    ],
    index_update_interval: Duration::from_secs(60),
    index_memory_limit: 256 * 1024 * 1024, // 256MB
};

let registry = ThreatRegistry::new()
    .with_index_config(index_config)
    .build();
```

#### Query Caching

```rust
use threat_intel::{ThreatRegistry, CacheConfig};

// Configure query caching
let cache_config = CacheConfig {
    cache_size: 10000,
    ttl: Duration::from_secs(300), // 5 minutes
    eviction_policy: EvictionPolicy::LRU,
    compression: true,
};

let registry = ThreatRegistry::new()
    .with_cache_config(cache_config)
    .build();
```

### 3. Network Optimization

#### Connection Pooling

```rust
use threat_intel::{ThreatRegistry, NetworkConfig};

// Configure connection pooling
let network_config = NetworkConfig {
    max_connections: 100,
    connection_timeout: Duration::from_secs(30),
    keep_alive: Duration::from_secs(60),
    retry_attempts: 3,
    retry_delay: Duration::from_secs(1),
};

let registry = ThreatRegistry::new()
    .with_network_config(network_config)
    .build();
```

#### Batch Processing

```rust
use threat_intel::{ThreatRegistry, BatchConfig};

// Configure batch processing
let batch_config = BatchConfig {
    batch_size: 1000,
    batch_timeout: Duration::from_secs(5),
    max_batch_size: 10000,
    parallel_batches: 4,
};

let registry = ThreatRegistry::new()
    .with_batch_config(batch_config)
    .build();
```

## Monitoring and Metrics

### 1. Built-in Metrics

#### Performance Metrics

```rust
use threat_intel::{ThreatRegistry, MetricsCollector};

// Configure metrics collection
let metrics_config = MetricsConfig {
    collect_performance: true,
    collect_memory: true,
    collect_network: true,
    collect_errors: true,
    export_interval: Duration::from_secs(60),
};

let registry = ThreatRegistry::new()
    .with_metrics_config(metrics_config)
    .build();

// Access metrics
let metrics = registry.get_metrics().await?;
println!("Threats processed: {}", metrics.threats_processed);
println!("Average latency: {}ms", metrics.avg_latency_ms);
println!("Memory usage: {}MB", metrics.memory_usage_mb);
```

#### Custom Metrics

```rust
use threat_intel::{ThreatRegistry, CustomMetric};

// Define custom metrics
let custom_metrics = vec![
    CustomMetric::new("threats_by_source", MetricType::Counter),
    CustomMetric::new("query_response_time", MetricType::Histogram),
    CustomMetric::new("error_rate", MetricType::Gauge),
];

let registry = ThreatRegistry::new()
    .with_custom_metrics(custom_metrics)
    .build();
```

### 2. Prometheus Integration

```rust
use threat_intel::{ThreatRegistry, PrometheusExporter};
use prometheus::{Counter, Histogram, Gauge, Registry};

// Configure Prometheus metrics
let prom_registry = Registry::new();
let threat_counter = Counter::new("threats_total", "Total threats processed").unwrap();
let latency_histogram = Histogram::new("threat_latency_seconds", "Threat processing latency").unwrap();
let memory_gauge = Gauge::new("memory_usage_bytes", "Memory usage in bytes").unwrap();

let exporter = PrometheusExporter::new(prom_registry, threat_counter, latency_histogram, memory_gauge);
let registry = ThreatRegistry::new()
    .with_exporter(exporter)
    .build();
```

### 3. Health Checks

```rust
use threat_intel::{ThreatRegistry, HealthCheckConfig};

// Configure health checks
let health_config = HealthCheckConfig {
    check_interval: Duration::from_secs(30),
    timeout: Duration::from_secs(5),
    checks: vec![
        HealthCheck::MemoryUsage { threshold: 0.8 },
        HealthCheck::ResponseTime { threshold: Duration::from_secs(1) },
        HealthCheck::ErrorRate { threshold: 0.05 },
        HealthCheck::DataFreshness { threshold: Duration::from_secs(300) },
    ],
};

let registry = ThreatRegistry::new()
    .with_health_config(health_config)
    .build();

// Check health status
let health = registry.check_health().await?;
if !health.is_healthy() {
    eprintln!("Health check failed: {:?}", health.issues);
}
```

## Benchmarking

### 1. Load Testing

```rust
use threat_intel::{ThreatRegistry, LoadTestConfig};

// Configure load test
let load_test_config = LoadTestConfig {
    duration: Duration::from_secs(300), // 5 minutes
    concurrent_users: 100,
    ramp_up_time: Duration::from_secs(60),
    test_scenarios: vec![
        LoadTestScenario::ThreatIngestion { rate: 1000 },
        LoadTestScenario::ThreatQuerying { rate: 500 },
        LoadTestScenario::ThreatUpdates { rate: 200 },
    ],
};

let registry = ThreatRegistry::new()
    .with_load_test_config(load_test_config)
    .build();

// Run load test
let results = registry.run_load_test().await?;
println!("Load test results: {:?}", results);
```

### 2. Performance Testing

```rust
use threat_intel::{ThreatRegistry, PerformanceTestConfig};

// Configure performance test
let perf_test_config = PerformanceTestConfig {
    test_cases: vec![
        PerformanceTestCase::ThreatIngestion {
            threat_count: 10000,
            expected_duration: Duration::from_secs(10),
        },
        PerformanceTestCase::ThreatQuerying {
            query_count: 1000,
            expected_duration: Duration::from_secs(5),
        },
        PerformanceTestCase::ThreatUpdates {
            update_count: 5000,
            expected_duration: Duration::from_secs(15),
        },
    ],
};

let registry = ThreatRegistry::new()
    .with_performance_test_config(perf_test_config)
    .build();

// Run performance test
let results = registry.run_performance_test().await?;
println!("Performance test results: {:?}", results);
```

## Resource Management

### 1. Memory Management

#### Garbage Collection

```rust
use threat_intel::{ThreatRegistry, GcConfig};

// Configure garbage collection
let gc_config = GcConfig {
    gc_interval: Duration::from_secs(300), // 5 minutes
    gc_threshold: 0.8, // 80% memory usage
    gc_aggressiveness: GcAggressiveness::Balanced,
    preserve_recent: true,
};

let registry = ThreatRegistry::new()
    .with_gc_config(gc_config)
    .build();
```

#### Memory Limits

```rust
use threat_intel::{ThreatRegistry, MemoryLimitConfig};

// Configure memory limits
let memory_limit_config = MemoryLimitConfig {
    max_memory: 2 * 1024 * 1024 * 1024, // 2GB
    warning_threshold: 0.8, // 80%
    critical_threshold: 0.9, // 90%
    action_on_limit: MemoryAction::StopAccepting,
};

let registry = ThreatRegistry::new()
    .with_memory_limit_config(memory_limit_config)
    .build();
```

### 2. CPU Management

#### Thread Pool Configuration

```rust
use threat_intel::{ThreatRegistry, ThreadPoolConfig};

// Configure thread pool
let thread_pool_config = ThreadPoolConfig {
    core_threads: 4,
    max_threads: 16,
    thread_timeout: Duration::from_secs(60),
    queue_size: 1000,
};

let registry = ThreatRegistry::new()
    .with_thread_pool_config(thread_pool_config)
    .build();
```

#### CPU Affinity

```rust
use threat_intel::{ThreatRegistry, CpuAffinityConfig};

// Configure CPU affinity
let cpu_affinity_config = CpuAffinityConfig {
    cpu_cores: vec![0, 1, 2, 3], // Use cores 0-3
    pin_threads: true,
    balance_load: true,
};

let registry = ThreatRegistry::new()
    .with_cpu_affinity_config(cpu_affinity_config)
    .build();
```

## Optimization Strategies

### 1. Data Structure Optimization

#### Efficient Data Structures

```rust
use threat_intel::{ThreatRegistry, DataStructureConfig};

// Configure data structures
let data_structure_config = DataStructureConfig {
    threat_storage: StorageType::BTreeMap, // For ordered access
    query_cache: StorageType::HashMap, // For fast lookups
    index_storage: StorageType::BTreeMap, // For range queries
    compression: CompressionType::LZ4,
};

let registry = ThreatRegistry::new()
    .with_data_structure_config(data_structure_config)
    .build();
```

#### Serialization Optimization

```rust
use threat_intel::{ThreatRegistry, SerializationConfig};

// Configure serialization
let serialization_config = SerializationConfig {
    format: SerializationFormat::Bincode, // Fast binary format
    compression: true,
    lazy_loading: true,
    batch_size: 1000,
};

let registry = ThreatRegistry::new()
    .with_serialization_config(serialization_config)
    .build();
```

### 2. Algorithm Optimization

#### Query Optimization

```rust
use threat_intel::{ThreatRegistry, QueryOptimizationConfig};

// Configure query optimization
let query_optimization_config = QueryOptimizationConfig {
    enable_query_planning: true,
    enable_query_caching: true,
    enable_query_rewriting: true,
    max_query_complexity: 1000,
};

let registry = ThreatRegistry::new()
    .with_query_optimization_config(query_optimization_config)
    .build();
```

#### Index Optimization

```rust
use threat_intel::{ThreatRegistry, IndexOptimizationConfig};

// Configure index optimization
let index_optimization_config = IndexOptimizationConfig {
    enable_partial_indexes: true,
    enable_covering_indexes: true,
    enable_index_merging: true,
    index_maintenance_interval: Duration::from_secs(3600), // 1 hour
};

let registry = ThreatRegistry::new()
    .with_index_optimization_config(index_optimization_config)
    .build();
```

## Performance Tuning

### 1. Configuration Tuning

#### System-level Tuning

```rust
use threat_intel::{ThreatRegistry, SystemTuningConfig};

// Configure system-level tuning
let system_tuning_config = SystemTuningConfig {
    enable_memory_mapping: true,
    enable_large_pages: true,
    enable_numa_awareness: true,
    enable_transparent_huge_pages: true,
};

let registry = ThreatRegistry::new()
    .with_system_tuning_config(system_tuning_config)
    .build();
```

#### Application-level Tuning

```rust
use threat_intel::{ThreatRegistry, ApplicationTuningConfig};

// Configure application-level tuning
let app_tuning_config = ApplicationTuningConfig {
    enable_async_processing: true,
    enable_parallel_processing: true,
    enable_batch_processing: true,
    enable_streaming: true,
};

let registry = ThreatRegistry::new()
    .with_application_tuning_config(app_tuning_config)
    .build();
```

### 2. Runtime Tuning

#### JIT Compilation

```rust
use threat_intel::{ThreatRegistry, JitConfig};

// Configure JIT compilation
let jit_config = JitConfig {
    enable_jit: true,
    jit_threshold: 1000, // Compile after 1000 calls
    jit_optimization_level: OptimizationLevel::Aggressive,
};

let registry = ThreatRegistry::new()
    .with_jit_config(jit_config)
    .build();
```

#### Profile-guided Optimization

```rust
use threat_intel::{ThreatRegistry, PgoConfig};

// Configure profile-guided optimization
let pgo_config = PgoConfig {
    enable_pgo: true,
    profile_collection_duration: Duration::from_secs(3600), // 1 hour
    profile_analysis_interval: Duration::from_secs(86400), // 24 hours
};

let registry = ThreatRegistry::new()
    .with_pgo_config(pgo_config)
    .build();
```

## Troubleshooting Performance Issues

### 1. Common Performance Problems

#### Memory Leaks

```rust
use threat_intel::{ThreatRegistry, MemoryLeakDetection};

// Enable memory leak detection
let leak_detection = MemoryLeakDetection {
    enable_detection: true,
    check_interval: Duration::from_secs(60),
    threshold: 100 * 1024 * 1024, // 100MB
    action: LeakAction::LogAndContinue,
};

let registry = ThreatRegistry::new()
    .with_memory_leak_detection(leak_detection)
    .build();
```

#### CPU Spikes

```rust
use threat_intel::{ThreatRegistry, CpuSpikeDetection};

// Enable CPU spike detection
let cpu_spike_detection = CpuSpikeDetection {
    enable_detection: true,
    threshold: 0.8, // 80% CPU usage
    duration: Duration::from_secs(30),
    action: CpuSpikeAction::Throttle,
};

let registry = ThreatRegistry::new()
    .with_cpu_spike_detection(cpu_spike_detection)
    .build();
```

### 2. Performance Debugging

#### Profiling

```rust
use threat_intel::{ThreatRegistry, ProfilingConfig};

// Configure profiling
let profiling_config = ProfilingConfig {
    enable_profiling: true,
    profile_sampling_rate: 0.01, // 1% sampling
    profile_duration: Duration::from_secs(300), // 5 minutes
    output_format: ProfileFormat::FlameGraph,
};

let registry = ThreatRegistry::new()
    .with_profiling_config(profiling_config)
    .build();
```

#### Tracing

```rust
use threat_intel::{ThreatRegistry, TracingConfig};

// Configure tracing
let tracing_config = TracingConfig {
    enable_tracing: true,
    trace_level: TraceLevel::Info,
    trace_sampling_rate: 0.1, // 10% sampling
    trace_export_interval: Duration::from_secs(60),
};

let registry = ThreatRegistry::new()
    .with_tracing_config(tracing_config)
    .build();
```

## Best Practices

### 1. Performance Best Practices

1. **Monitor Continuously**: Set up continuous monitoring of key metrics
2. **Profile Regularly**: Use profiling to identify bottlenecks
3. **Optimize Incrementally**: Make small, measurable improvements
4. **Test Under Load**: Always test with realistic load patterns
5. **Plan for Scale**: Design for expected growth in data and users

### 2. Resource Management Best Practices

1. **Set Limits**: Always set memory and CPU limits
2. **Monitor Usage**: Continuously monitor resource usage
3. **Implement Backpressure**: Handle overload gracefully
4. **Use Caching**: Cache frequently accessed data
5. **Optimize Queries**: Use efficient query patterns

### 3. Deployment Best Practices

1. **Horizontal Scaling**: Use multiple instances for high availability
2. **Load Balancing**: Distribute load across instances
3. **Resource Isolation**: Isolate resources per instance
4. **Monitoring**: Implement comprehensive monitoring
5. **Alerting**: Set up alerts for performance issues