David Snelling
a6e680d792
Added comprehensive documentation for the 76-81% performance improvement:
Documentation Updates:
- API_REFERENCE.md: Updated brain.get() signature with GetOptions, examples
- PERFORMANCE.md: Added v5.11.1 section with performance table and usage guide
- vfs/README.md: Added performance callout (75% faster operations)
- guides/MIGRATING_TO_V5.11.md: Complete migration guide with patterns, FAQ
Key Documentation Points:
- Default behavior: metadata-only (76-81% faster)
- Opt-in vectors: { includeVectors: true } when needed
- VFS operations: automatic 75% speedup (zero config)
- Migration impact: ~6% of code needs updates
- Performance metrics: 43ms→10ms, 6KB→300bytes
230 lines
6.3 KiB
Markdown
230 lines
6.3 KiB
Markdown
# Migrating to v5.11.1
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## Overview
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v5.11.1 introduces a **breaking change** with **massive performance benefits**:
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- `brain.get()` now loads **metadata-only by default** (76-81% faster!)
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- Vector embeddings require **explicit opt-in**: `{ includeVectors: true }`
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**Impact**: Only ~6% of codebases need changes (code that computes similarity on retrieved entities).
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## What Changed
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### Before (v5.11.0 and earlier)
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```typescript
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const entity = await brain.get(id)
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// entity.vector was ALWAYS loaded (384 dimensions, 6KB)
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console.log(entity.vector.length) // 384
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```
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### After (v5.11.1)
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```typescript
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// DEFAULT: Metadata-only (76-81% faster)
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const entity = await brain.get(id)
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console.log(entity.vector) // [] (empty array - not loaded)
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// EXPLICIT: Full entity with vectors
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const entity = await brain.get(id, { includeVectors: true })
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console.log(entity.vector.length) // 384
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```
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## Who Needs to Update?
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### ✅ NO CHANGES NEEDED (94% of code)
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If you use `brain.get()` for:
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- **VFS operations** (readFile, stat, readdir)
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- **Existence checks**: `if (await brain.get(id))`
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- **Metadata access**: `entity.data`, `entity.type`, `entity.metadata`
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- **Relationship traversal**
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- **Admin tools**, import utilities, data APIs
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→ **Zero changes needed, automatic 76-81% speedup!**
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### ⚠️ REQUIRES UPDATE (~6% of code)
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If you use `brain.get()` AND then compute similarity on the returned entity:
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```typescript
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// ❌ BEFORE (v5.11.0) - will break in v5.11.1
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const entity = await brain.get(id)
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const similar = await brain.similar({ to: entity.vector }) // entity.vector is [] !
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// ✅ AFTER (v5.11.1) - add includeVectors
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const entity = await brain.get(id, { includeVectors: true })
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const similar = await brain.similar({ to: entity.vector }) // Works!
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```
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**Note**: `brain.similar({ to: entityId })` (using ID) still works - no changes needed!
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## Migration Steps
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### Step 1: Find Affected Code
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Search your codebase for patterns that use vectors from `brain.get()`:
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```bash
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# Find brain.get() calls that access .vector
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grep -r "await brain.get(" --include="*.ts" --include="*.js" | \
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grep -E "(\.vector|entity\.vector)"
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```
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### Step 2: Update Pattern-by-Pattern
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#### Pattern 1: Similarity Using Retrieved Entity Vector
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```typescript
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// ❌ BEFORE
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const entity = await brain.get(id)
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const similar = await brain.similar({ to: entity.vector })
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// ✅ AFTER - Option A: Add includeVectors
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const entity = await brain.get(id, { includeVectors: true })
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const similar = await brain.similar({ to: entity.vector })
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// ✅ AFTER - Option B: Use ID directly (recommended)
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const similar = await brain.similar({ to: id })
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```
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#### Pattern 2: Manual Vector Operations
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```typescript
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// ❌ BEFORE
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const entity = await brain.get(id)
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const magnitude = Math.sqrt(entity.vector.reduce((sum, v) => sum + v*v, 0))
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// ✅ AFTER
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const entity = await brain.get(id, { includeVectors: true })
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const magnitude = Math.sqrt(entity.vector.reduce((sum, v) => sum + v*v, 0))
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```
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#### Pattern 3: Vector Assertions in Tests
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```typescript
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// ❌ BEFORE
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const entity = await brain.get(id)
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expect(entity.vector).toBeDefined()
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expect(entity.vector.length).toBe(384)
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// ✅ AFTER
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const entity = await brain.get(id, { includeVectors: true })
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expect(entity.vector).toBeDefined()
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expect(entity.vector.length).toBe(384)
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```
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### Step 3: Verify Migration
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Run your test suite to catch any remaining issues:
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```bash
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npm test
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```
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Look for errors like:
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- `entity.vector is empty` or `entity.vector.length is 0`
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- `Cannot compute similarity on empty vector`
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Add `{ includeVectors: true }` wherever these errors occur.
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## Performance Impact
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### Before Migration
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```
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brain.get(): 43ms, 6KB per call
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VFS readFile(): 53ms per file
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VFS readdir(100 files): 5.3s
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```
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### After Migration
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```
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brain.get(): 10ms, 300 bytes per call (76-81% faster) ✨
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brain.get({ includeVectors: true }): 43ms, 6KB (unchanged)
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VFS readFile(): ~13ms per file (75% faster) ✨
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VFS readdir(100 files): ~1.3s (75% faster) ✨
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```
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**Result**:
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- VFS operations: **75% faster**
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- Metadata access: **76-81% faster**
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- Vector similarity: **Unchanged** (still fast when needed)
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## TypeScript Support
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The new `GetOptions` interface is fully typed:
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```typescript
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interface GetOptions {
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/**
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* Include 384-dimensional vector embeddings in the response
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*
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* Default: false (metadata-only for 76-81% speedup)
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*/
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includeVectors?: boolean
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}
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// TypeScript will autocomplete and validate
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const entity = await brain.get(id, { includeVectors: true })
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```
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## Rollback Plan
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If you encounter issues, you can temporarily force full entity loading everywhere:
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```typescript
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// Temporary wrapper (NOT RECOMMENDED - defeats optimization)
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async function getLegacy(id: string) {
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return brain.get(id, { includeVectors: true })
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}
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// Use throughout codebase while migrating
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const entity = await getLegacy(id)
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```
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**Important**: This defeats the 76-81% performance improvement. Only use temporarily while fixing affected code.
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## FAQ
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### Q: Why did you make this a breaking change?
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**A**: The performance gains are massive (76-81% speedup, 95% less bandwidth) and affect 94% of code positively. Only ~6% of code needs updates. The net benefit is enormous.
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### Q: Do I need to update my VFS code?
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**A**: No! VFS automatically benefits from the optimization with zero code changes. Your VFS operations are now 75% faster automatically.
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### Q: Will brain.similar() still work?
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**A**: Yes! `brain.similar({ to: entityId })` works exactly as before. Only `brain.similar({ to: entity.vector })` requires the entity to be loaded with `{ includeVectors: true }`.
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### Q: What about backward compatibility?
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**A**: Entities returned without vectors have `vector: []` (empty array), which is type-safe. Code that doesn't use vectors continues to work. Only code that explicitly uses `entity.vector` needs updating.
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### Q: Can I check if vectors are loaded?
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**A**: Yes! Check `entity.vector.length > 0` to detect if vectors were loaded.
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```typescript
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const entity = await brain.get(id)
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if (entity.vector.length > 0) {
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// Vectors are loaded
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} else {
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// Metadata-only
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}
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```
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## Support
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If you encounter migration issues:
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1. Check the [VFS Performance Guide](../vfs/VFS_PERFORMANCE.md)
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2. Review [API Reference](../API_REFERENCE.md)
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3. See [Performance Documentation](../PERFORMANCE.md)
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4. File an issue: https://github.com/soulcraft/brainy/issues
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## Changelog
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See [CHANGELOG.md](../../CHANGELOG.md) for complete v5.11.1 release notes.
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