facebook/memlab

Features

• Memory Leak Detection - Provides a comprehensive toolkit for identifying and analyzing memory leaks in web applications.
• Automated Leak Testing Frameworks - Provides an automated framework that executes browser interaction sequences to programmatically isolate memory regressions.
• Growth Analysis - Inspects heap snapshots for duplicated strings and expanding object shapes to identify memory inefficiencies.
• Pattern Recognition - Detects specific heap patterns such as detached DOM elements and global variables to identify memory leaks.
• Memory Regression - Integrates browser interaction scenarios into pipelines to programmatically detect memory regressions.
• JavaScript Memory Debuggers - Traces reference chains from garbage collection roots to leaked objects in web applications.
• JavaScript Memory Leak Detection - Detects JavaScript-specific memory leaks and detached DOM elements that fail to be garbage collected.
• Memory Profilers - Analyzes memory consumption by React components and hooks to identify unmounted internal nodes.
• Heap Graph Snapshot Analyzers - Queries object graphs from heap snapshots to identify retained objects and unbound growth.
• Heap Snapshot Comparison - Implements differential analysis between multiple heap snapshots to isolate objects that persist across interaction cycles.
• Heap Snapshot Capturers - Provides tools to trigger and save heap snapshots from web applications for offline analysis.
• Memory Growth Diagnosis - Compares heap sizes across sequences of browser interactions to pinpoint memory growth.
• Reference Chain Analysis - Generates reference chains from GC roots to leaked objects to explain why memory is being retained.
• Heap - Monitors object shapes and string counts across snapshots to detect unbound memory expansion.
• Automated Memory Profilers - Runs end-to-end browser interaction scenarios to programmatically measure and validate memory consumption.
• Browser Automation - Drives browser interactions through automated sequences of setup, action, and undo steps to isolate memory growth.
• Leaked Object Identification - Identifies leaked objects and detached DOM elements by clustering retainer traces from heap snapshots.
• Leak Test Scenarios - Allows configuration of end-to-end interactions, including page loading and action-undo cycles, to identify memory leaks.
• Retainer Path Tracing - Generates reference chains from garbage collection roots to leaked objects to visualize why memory is retained.
• Detached DOM Detection - Detects DOM elements that remain in memory after being disconnected from the document tree.
• Leak Report Filterings - Implements custom filtering logic to exclude specific classes or objects from memory leak reports based on application criteria.
• Object Graph Tracing - Traces reference chains from garbage collection roots to specific objects to reveal retention reasons.
• Automated End-to-End Testing - Executes end-to-end browser interaction sequences to trigger and isolate potential memory regressions.
• UI Component - Analyzes memory consumption of specific UI components and their retainer paths to optimize performance.
• Memory Footprint Reduction - Includes a command-line toolbox to identify opportunities for reducing the application's memory footprint.
• Object Reference Path Inspectors - Filters the heap graph to identify the shortest path from a garbage collection root to a leaked object.
• Cross-Runtime Snapshot Exploration - Provides a programmatic and visual interface to explore heap snapshots from various JavaScript runtimes.
• Snapshot Object Searching - Enables searching heap snapshots for objects based on their class names or specific property values.
• Interactive Exploration - Ships interactive commands to view and explore the contents of single heap snapshots.
• Multi-Snapshot Analysis - Analyzes memory leaks by comparing baseline, target, and final heap snapshots.
• Object Shape Tracking - Tracks specific object shapes and strings across snapshots to identify items that grow indefinitely.
• Automated Test Execution - Provides a command line interface to trigger memory analysis runs within automated CI/CD pipelines.
• Visual Leak Debugging - Ships a browser overlay that highlights detached DOM elements and leaking components to help trace retainer paths.
• Variability Measurement - Executes test scenarios repetitively to gather data points and isolate real leaks from noise.
• Retainer Trace Filtering - Filters object references to isolate the shortest path from garbage collection roots to leaked objects.
• State Assertions - Implements programmatic assertions to validate that the memory state of a program matches expected values.
• Garbage Collection Assertions - Programmatically validates that specific object types or classes are garbage collected after defined interactions.

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