Use Case: nodejs/node - The Node.js Runtime

Repository: https://github.com/nodejs/node Stack: JavaScript + C++ Test Date: 2025-12-08 Loctree Version: 0.6.2-dev

Overview

Testing loctree on THE Node.js runtime - massive hybrid codebase.

Repository Scale

Metric	Value
Total Files	~20,400 JS files
lib/ Only	348 files
Analysis Time	0.13s (lib/ only)

Known Issue

UTF-8 Error on Full Repository:

Error: stream did not contain valid UTF-8

Cause: Binary ICU Unicode data files (icudt77l.dat.bz2)

Workaround: Test lib/ directory only.

Findings (lib/ Directory)

Dead Code Detection

High Confidence: 1 finding
False Positive Rate: 0%

The single finding (eslint.config_partial.mjs default export) is a true positive within the isolated scope.

Architecture

Circular Imports: 0 (perfect architecture!)
Node.js core lib has excellent module structure

Commands Used

cd nodejs/lib
loct                              # Create snapshot (0.13s!)
loct dead --confidence high       # Dead code analysis
loct cycles                       # Circular dependencies

Verdict

INCONCLUSIVE - Binary file handling needs improvement.

Key Insights

Performance: Lightning fast on pure JS (0.13s for 348 files)
Accuracy: 0% FP within scope
Blocker: Binary file detection needed

Recommendations

For Node.js-style repos:

Add .loctreeignore for binary directories
Implement graceful UTF-8 error recovery
Auto-detect and skip binary files