Heapseer

JavaScript heap snapshot analyzer for Node.js. Find memory leaks, track regressions, and understand what's using memory.

Install

npm install -g heapseer

Quick Start

# Analyze a snapshot
heapseer analyze snapshot.heapsnapshot

# Find memory leaks
heapseer leaks snapshot.heapsnapshot

# Find hotspots (top memory users)
heapseer hotspots snapshot.heapsnapshot

# Find reference chains to an object
heapseer references snapshot.heapsnapshot ObjectName

# Compare two snapshots
heapseer compare current.heapsnapshot baseline.heapsnapshot

Output Formats

heapseer analyze snapshot.heapsnapshot --format json
heapseer analyze snapshot.heapsnapshot --format csv

Features

• Parse V8 heap snapshots
• Detect memory leaks automatically
• Track memory regressions
• Find GC roots & reference chains
• Build dominator trees
• Identify hot spots
• Export to JSON/CSV

Library Usage

const { HeapSnapshotAnalyzer } = require('heapseer');

const analyzer = new HeapSnapshotAnalyzer('snapshot.json');
const analysis = analyzer.analyze();

console.log(analysis.memorySinks);
console.log(analysis.leaks);

Help

heapseer --help
heapseer analyze --help