613 lines
12 KiB
Markdown
613 lines
12 KiB
Markdown
# Performance Tuning Guidelines
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## When to Use
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When opencode performance needs optimization for:
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- Faster response times and lower latency
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- Reduced memory usage and better resource management
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- Improved large project handling
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- Better concurrent operation support
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- Optimal configuration for your hardware and workflow
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## How It Works
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opencode's performance can be tuned across multiple dimensions: memory usage, CPU efficiency, disk I/O, network latency, and configuration optimization. This skill provides comprehensive guidelines for each area.
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## System-Level Optimization
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### 1. Memory Management
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```json
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{
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"memory": {
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"limits": {
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"maxHeapSize": "2G",
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"maxOldSpaceSize": "1G",
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"maxSemiSpaceSize": "256M",
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"maxNewSpaceSize": "128M"
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},
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"garbageCollection": {
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"strategy": "balanced", // "throughput", "lowLatency", "balanced"
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"incremental": true,
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"parallel": true,
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"concurrent": true
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},
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"cache": {
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"fileSystem": {
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"enabled": true,
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"maxSize": "500MB",
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"ttl": 3600
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},
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"parsedFiles": {
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"enabled": true,
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"maxCount": 1000,
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"maxSize": "100MB"
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},
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"network": {
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"enabled": true,
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"maxSize": "50MB"
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}
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}
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}
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}
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```
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### 2. CPU Optimization
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```json
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{
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"cpu": {
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"threading": {
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"workerThreads": 4,
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"ioThreads": 2,
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"maxConcurrentOperations": 10
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},
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"scheduling": {
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"priority": "normal", // "low", "normal", "high", "realtime"
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"affinity": "auto", // "auto" or CPU mask
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"yieldStrategy": "cooperative"
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},
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"profiling": {
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"enabled": false,
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"sampleRate": 100, // samples per second
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"output": "cpu-profile.json"
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}
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}
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}
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```
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### 3. Disk I/O Optimization
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```json
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{
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"disk": {
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"buffering": {
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"writeBufferSize": "64KB",
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"readBufferSize": "64KB",
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"asyncIO": true,
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"directIO": false
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},
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"caching": {
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"directoryCache": true,
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"fileContentCache": true,
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"metadataCache": true,
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"maxCacheSize": "200MB"
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},
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"filesystem": {
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"watchInterval": 1000, // ms
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"recursiveWatch": true,
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"ignorePatterns": ["node_modules", ".git", "dist", "build"]
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}
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}
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}
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```
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## Network Optimization
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### 1. API Request Optimization
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```json
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{
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"network": {
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"api": {
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"timeout": 30000, // ms
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"retries": 3,
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"backoff": {
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"initial": 1000,
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"multiplier": 2,
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"max": 10000
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},
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"compression": true,
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"keepAlive": true,
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"poolSize": 10
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},
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"streaming": {
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"chunkSize": 1024,
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"bufferSize": 8192,
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"timeout": 60000
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},
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"cdn": {
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"enabled": true,
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"fallback": true,
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"prefetch": true
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}
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}
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}
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```
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### 2. Proxy and Connection Management
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```json
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{
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"proxy": {
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"http": "${HTTP_PROXY}",
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"https": "${HTTPS_PROXY}",
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"noProxy": "localhost,127.0.0.1",
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"tunnel": true
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},
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"dns": {
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"cache": true,
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"ttl": 300,
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"preferIPv6": false
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},
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"tls": {
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"minVersion": "TLSv1.2",
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"ciphers": "HIGH:!aNULL:!MD5",
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"sessionCache": true,
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"sessionTimeout": 300
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}
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}
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```
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## Configuration Optimization
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### 1. Startup Performance
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```json
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{
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"startup": {
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"lazyLoading": {
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"enabled": true,
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"modules": ["mcp", "lsp", "plugins"],
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"delay": 1000 // ms
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},
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"preload": {
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"coreModules": true,
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"frequentFiles": true,
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"recentProjects": 3
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},
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"parallelInitialization": true,
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"progressReporting": true
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}
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}
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```
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### 2. Plugin Performance
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```json
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{
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"plugins": {
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"loading": {
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"parallel": true,
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"timeout": 10000,
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"maxConcurrent": 5
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},
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"isolation": {
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"sandbox": true,
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"memoryLimit": "256MB",
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"timeout": 5000
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},
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"optimization": {
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"treeShaking": true,
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"deadCodeElimination": true,
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"minification": true
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}
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}
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}
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```
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## Large Project Optimization
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### 1. File System Scanning
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```json
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{
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"largeProjects": {
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"fileSystem": {
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"maxFiles": 10000,
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"maxDepth": 10,
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"ignorePatterns": [
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"**/node_modules/**",
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"**/.git/**",
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"**/dist/**",
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"**/build/**",
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"**/*.min.js",
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"**/*.bundle.js"
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],
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"scanStrategy": "incremental", // "full", "incremental", "cached"
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"scanInterval": 5000
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},
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"indexing": {
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"enabled": true,
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"background": true,
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"priority": "low",
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"batchSize": 100
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}
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}
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}
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```
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### 2. Memory-Efficient Operations
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```json
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{
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"efficientOperations": {
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"streaming": {
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"fileReading": true,
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"fileWriting": true,
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"processing": true
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},
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"chunking": {
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"largeFiles": true,
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"threshold": 1048576, // 1MB
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"chunkSize": 65536 // 64KB
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},
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"pagination": {
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"searchResults": 50,
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"fileList": 100,
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"chatHistory": 100
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}
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}
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}
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```
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## Monitoring and Profiling
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### 1. Performance Metrics
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```json
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{
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"metrics": {
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"collection": {
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"enabled": true,
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"interval": 60000, // 1 minute
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"retention": "7d"
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},
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"track": [
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"memory.heapUsed",
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"memory.external",
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"cpu.usage",
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"disk.io",
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"network.latency",
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"response.time",
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"cache.hitRate"
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],
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"alerts": {
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"memory": {"warning": "80%", "critical": "90%"},
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"cpu": {"warning": "70%", "critical": "90%"},
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"latency": {"warning": "1000ms", "critical": "5000ms"}
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}
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}
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}
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```
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### 2. Profiling Tools
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```bash
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#!/bin/bash
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# ~/.opencode/profile.sh
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# Memory profiling
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opencode profile-memory --output memory-profile.json
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# CPU profiling
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opencode profile-cpu --duration 30 --output cpu-profile.json
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# I/O profiling
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opencode profile-io --output io-profile.json
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# Network profiling
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opencode profile-network --output network-profile.json
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# Generate report
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opencode profile-report \
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--memory memory-profile.json \
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--cpu cpu-profile.json \
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--io io-profile.json \
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--network network-profile.json \
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--output performance-report.html
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```
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## Hardware-Specific Tuning
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### 1. Low-End Hardware
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```json
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{
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"lowEndHardware": {
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"memory": {
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"maxHeapSize": "512M",
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"cacheSizes": {
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"fileSystem": "50MB",
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"parsedFiles": "10MB",
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"network": "5MB"
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}
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},
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"cpu": {
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"workerThreads": 2,
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"maxConcurrentOperations": 3
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},
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"features": {
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"syntaxHighlighting": false,
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"animations": false,
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"previewPanes": false,
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"autoComplete": "basic"
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}
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}
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}
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```
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### 2. High-End Workstation
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```json
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{
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"highEndWorkstation": {
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"memory": {
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"maxHeapSize": "4G",
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"cacheSizes": {
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"fileSystem": "2G",
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"parsedFiles": "500MB",
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"network": "100MB"
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}
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},
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"cpu": {
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"workerThreads": 8,
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"maxConcurrentOperations": 20
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},
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"features": {
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"parallelProcessing": true,
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"backgroundIndexing": true,
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"predictiveLoading": true,
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"advancedCaching": true
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}
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}
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}
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```
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## Workflow-Specific Optimization
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### 1. Development Workflow
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```json
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{
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"development": {
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"incrementalCompilation": true,
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"hotReload": true,
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"livePreview": true,
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"autoSave": {
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"enabled": true,
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"delay": 1000
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},
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"testing": {
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"parallel": true,
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"watch": true,
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"coverage": true
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}
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}
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}
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```
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### 2. Code Review Workflow
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```json
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{
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"codeReview": {
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"diffOptimization": {
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"unified": true,
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"contextLines": 3,
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"ignoreWhitespace": true
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},
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"analysis": {
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"parallel": true,
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"cacheResults": true,
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"incremental": true
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},
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"presentation": {
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"sideBySide": true,
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"syntaxHighlighting": true,
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"collapsibleSections": true
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}
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}
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}
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```
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## Advanced Optimization Techniques
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### 1. Just-In-Time Compilation
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```json
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{
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"jit": {
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"enabled": true,
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"threshold": 100, // Number of executions before JIT
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"optimizationLevel": 2, // 0-3
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"profiling": {
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"enabled": true,
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"feedback": true
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}
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}
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}
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```
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### 2. Predictive Loading
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```json
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{
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"predictiveLoading": {
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"enabled": true,
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"strategies": {
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"fileAccess": {
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"patternBased": true,
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"frequencyBased": true,
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"recencyBased": true
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},
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"moduleLoading": {
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"dependencyAnalysis": true,
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"usagePatterns": true
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}
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},
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"cache": {
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"preloadedFiles": 10,
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"preloadedModules": 5
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}
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}
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}
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```
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## Benchmarking and Testing
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### 1. Performance Test Suite
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```bash
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#!/bin/bash
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# ~/.opencode/benchmark.sh
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echo "Running opencode performance benchmarks..."
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echo "=========================================="
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# Startup time
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echo -n "Startup time: "
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time opencode --version > /dev/null
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# Memory usage
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echo -n "Memory usage: "
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opencode profile-memory --quick | grep "heapUsed"
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# File loading
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echo -n "File loading (100KB): "
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time opencode eval "fs.readFileSync('test-100kb.txt', 'utf8')" > /dev/null
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# Syntax highlighting
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echo -n "Syntax highlighting: "
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time opencode eval "highlight('test.js')" > /dev/null
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# Code analysis
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echo -n "Code analysis: "
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time opencode eval "analyze('test.js')" > /dev/null
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echo "Benchmark complete."
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```
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### 2. Regression Testing
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```json
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{
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"regressionTesting": {
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"enabled": true,
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"tests": [
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{
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"name": "startupTime",
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"command": "opencode --version",
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"maxTime": 2000,
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"metric": "duration"
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},
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{
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"name": "memoryUsage",
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"command": "opencode profile-memory --quick",
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"maxValue": 100,
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"metric": "heapUsedMB"
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},
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{
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"name": "fileLoad",
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"command": "opencode eval \"fs.readFileSync('test.txt', 'utf8')\"",
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"maxTime": 100,
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"metric": "duration"
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}
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],
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"schedule": "daily",
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"alertOnRegression": true
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}
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}
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```
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## Troubleshooting Performance Issues
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### 1. Diagnostic Commands
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```bash
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# Check current performance stats
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opencode perf-stats
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# Generate performance report
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opencode perf-report --output report.html
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# Identify bottlenecks
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opencode perf-bottlenecks
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# Compare configurations
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opencode perf-compare config1.json config2.json
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# Reset to defaults
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opencode perf-reset
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```
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### 2. Common Issues and Solutions
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**High Memory Usage:**
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- Reduce cache sizes
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- Enable garbage collection tuning
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- Limit concurrent operations
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- Disable memory-intensive features
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**Slow Startup:**
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- Enable lazy loading
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- Reduce preloaded modules
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- Disable unnecessary plugins
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- Use faster storage (SSD)
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**High CPU Usage:**
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- Reduce worker threads
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- Disable background indexing
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- Limit syntax highlighting complexity
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- Use simpler algorithms
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**Network Latency:**
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- Enable compression
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- Use connection pooling
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- Implement caching
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- Reduce request size
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## Best Practices
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### 1. Regular Maintenance
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- Monitor performance metrics regularly
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- Clean up cache files periodically
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- Update to latest versions
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- Review and optimize configuration
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- Remove unused plugins and extensions
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### 2. Progressive Optimization
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1. **Baseline**: Establish current performance metrics
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2. **Identify**: Use profiling to find bottlenecks
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3. **Prioritize**: Focus on highest-impact optimizations
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4. **Implement**: Apply optimizations incrementally
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5. **Verify**: Test after each change
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6. **Monitor**: Continuously track performance
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### 3. Configuration Management
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- Keep configurations in version control
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- Document optimization decisions
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- Create environment-specific configurations
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- Use inheritance for common settings
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- Validate configurations regularly
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## Resources
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- [opencode Performance Guide](https://opencode.ai/docs/performance)
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- [Node.js Performance Best Practices](https://nodejs.org/en/docs/guides/performance-best-practices)
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- [Chrome DevTools Performance](https://developer.chrome.com/docs/devtools/performance/)
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- [Memory Management Guide](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Memory_Management)
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- [Profiling Tools Comparison](https://github.com/thlorenz/v8-perf) |