ComplexityLens

AI-powered Python complexity analyzer for VSCode. See Big-O notation instantly as you code.

Features

• Instant complexity preview: Select code → see ⚡ O(n²) appear inline
• AI-powered analysis: Detailed breakdown with bottlenecks and optimization suggestions
• Smart caching: Reuses results for identical code
• Works offline: Falls back to heuristics when API is unavailable

Installation

From .vsix file:

1. Download complexity-lens-0.0.1.vsix from Releases
2. Open VSCode
3. Press Cmd+Shift+P (Mac) or Ctrl+Shift+P (Windows/Linux)
4. Type "Extensions: Install from VSIX"
5. Select the downloaded file

From Marketplace:

Search for "ComplexityLens" in VSCode Extensions

Setup

1. Get an Anthropic API key from console.anthropic.com
2. Open VSCode Settings (Cmd+, or Ctrl+,)
3. Search for "Complexity Lens"
4. Paste your API key in "Complexity Lens: Api Key"

Usage

1. Open a Python file
2. Select any code snippet
3. See instant ⚡ O(n) preview appear next to your selection
4. Press Cmd+Shift+C (Mac) or Ctrl+Shift+C (Windows/Linux) for detailed analysis

Examples

Binary Search