chore: wip

Author: chrisbbreuer

packages/launchpad/benchmark/README.md

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+# File Detection Performance Comparison
+
+This benchmark compares the performance of different approaches for detecting project configuration files in directory trees, specifically comparing the current shell-based implementation with custom Bun/TypeScript alternatives.
+
+## 🎯 Key Findings
+
+The Bun-based approaches are **dramatically faster** than the current shell implementation:
+
+- **Bun Direct (sync)**: **99.2% faster** on average
+- **Bun Glob (async)**: **98.9% faster** on average
+
+## 📊 Detailed Results
+
+| Test Scenario | Bun Direct | Bun Glob | Shell (Current) | Speed Improvement |
+|---------------|------------|----------|-----------------|-------------------|
+| Shallow (3 levels) | 0.12ms | 0.27ms | 24.85ms | **99.5% faster** |
+| Medium (7 levels) | 0.31ms | 0.74ms | 49.96ms | **99.4% faster** |
+| Deep (15 levels) | 0.72ms | 0.94ms | 89.68ms | **99.2% faster** |
+| Very Deep (25 levels) | 1.39ms | 1.53ms | 143.67ms | **99.0% faster** |
+
+## 🔍 Analysis
+
+### Current Shell Approach
+```bash
+files=$(ls -1a "$dir" 2>/dev/null | grep -E '^(dependencies|deps|pkgx|launchpad)\.(yaml|yml)$|^package\.json$|...' | head -1)
+```
+
+**Pros:**
+- ✅ Works in any environment (no runtime dependencies)
+- ✅ Leverages optimized shell commands (`ls`, `grep`)
+- ✅ Consistent performance regardless of directory depth
+
+**Cons:**
+- ❌ **Significant process overhead** (spawning shell, pipes, regex)
+- ❌ **Poor scalability** - gets slower with deeper directory trees
+- ❌ **25-140ms per lookup** depending on depth
+
+### Bun Direct Approach (Recommended)
+```typescript
+for (const file of PROJECT_FILES) {
+  const filePath = join(currentDir, file)
+  if (existsSync(filePath)) {
+    return currentDir
+  }
+}
+```
+
+**Pros:**
+- ✅ **Fastest performance** (0.12-1.39ms)
+- ✅ **No async overhead**
+- ✅ **Simple, readable implementation**
+- ✅ **Excellent scalability**
+- ✅ **Direct file system calls**
+
+**Cons:**
+- ❌ Requires Node.js/Bun runtime
+- ❌ Multiple `existsSync` calls (though still faster)
+
+### Bun Glob Approach
+```typescript
+const glob = new Glob(`{${PROJECT_FILES.join(',')}}`)
+for await (const file of glob.scan({ cwd: currentDir, onlyFiles: true })) {
+  return currentDir // Found a match
+}
+```
+
+**Pros:**
+- ✅ **Very fast performance** (0.27-1.53ms)
+- ✅ **Flexible pattern matching**
+- ✅ **Single glob operation per directory**
+
+**Cons:**
+- ❌ **Async overhead** (slightly slower than direct approach)
+- ❌ Requires Node.js/Bun runtime
+- ❌ More complex implementation
+
+## 🚀 Performance Characteristics
+
+### Scaling with Directory Depth
+
+| Depth | Shell Time | Bun Direct | Bun Glob | Shell Overhead |
+|-------|------------|------------|----------|----------------|
+| 3 levels | 24.85ms | 0.12ms | 0.27ms | **207x slower** |
+| 7 levels | 49.96ms | 0.31ms | 0.74ms | **161x slower** |
+| 15 levels | 89.68ms | 0.72ms | 0.94ms | **124x slower** |
+| 25 levels | 143.67ms | 1.39ms | 1.53ms | **103x slower** |
+
+**Key Observations:**
+- Shell approach has **linear degradation** with depth
+- Bun approaches scale much better
+- The deeper the directory tree, the more pronounced the performance difference
+
+## 💡 Recommendations
+
+### 1. **Primary Recommendation: Hybrid Approach**
+
+Implement a hybrid solution that uses Bun when available, falls back to shell:
+
+```typescript
+function findProjectRoot(startDir: string): string | null {
+  // Try Bun approach first (when in Node.js/Bun environment)
+  if (typeof process !== 'undefined') {
+    return findProjectRootBunSync(startDir)
+  }
+
+  // Fallback to shell approach
+  return findProjectRootShell(startDir)
+}
+```
+
+### 2. **For Pure Performance: Bun Direct**
+
+If you can guarantee a Node.js/Bun runtime, use the direct file system approach:
+- **99.2% faster** than current implementation
+- Simple, maintainable code
+- Excellent scalability
+
+### 3. **For Flexibility: Bun Glob**
+
+If you need more complex pattern matching or plan to extend file detection:
+- **98.9% faster** than current implementation
+- More flexible for future enhancements
+- Slightly more overhead due to async nature
+
+## 🔧 Implementation Impact
+
+### Current Usage Patterns
+The file detection is used in:
+- Shell integration (`__lp_find_deps_dir`)
+- Project root discovery
+- Development environment setup
+
+### Migration Considerations
+1. **Backward Compatibility**: Keep shell version for environments without Node.js
+2. **Runtime Detection**: Detect available runtime and choose appropriate method
+3. **Caching**: Both approaches benefit from the existing caching mechanism
+4. **Error Handling**: Ensure graceful fallback between approaches
+
+## 🧪 Running the Benchmark
+
+```bash
+cd packages/launchpad/benchmark
+bun install
+bun run file-detection-comparison.ts
+```
+
+The benchmark creates temporary directory structures at various depths and measures the time to find project files, providing comprehensive performance data across different scenarios.
+
+## 📈 Conclusion
+
+The performance difference is **dramatic and consistent**:
+- Bun approaches are **~100x faster** than the shell approach
+- The performance gap **increases** with directory depth
+- Implementation complexity is **minimal** for the Bun direct approach
+
+**Recommendation**: Implement the hybrid approach with Bun Direct as primary and shell as fallback for maximum performance while maintaining compatibility.

packages/launchpad/benchmark/bun.lock

@@ -0,0 +1,22 @@
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+      "name": "@launchpad/benchmark",
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+
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+
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+
+    "csstype": ["[email protected]", "", {}, "sha512-M1uQkMl8rQK/szD0LNhtqxIPLpimGm8sOBwU7lLnCpSbTyY3yeU1Vc7l4KT5zT4s/yOxHH5O7tIuuLOCnLADRw=="],
+
+    "undici-types": ["[email protected]", "", {}, "sha512-t5Fy/nfn+14LuOc2KNYg75vZqClpAiqscVvMygNnlsHBFpSXdJaYtXMcdNLpl/Qvc3P2cB3s6lOV51nqsFq4ag=="],
+  }
+}