database-performance

name	database-performance
description	Database query optimization for Canvas plugins - N+1 detection, prefetch_related, select_related

Database Performance Skill

This skill provides database query optimization guidelines for Canvas plugins. Use it to identify N+1 query issues and optimize data access patterns using Django ORM best practices.

When to Use This Skill

Use this skill when:

• Reviewing plugin code that queries Canvas data models
• Identifying potential N+1 query problems
• Optimizing loops that access related objects
• Auditing database access patterns before deployment

Quick Detection

Search for these patterns that often indicate N+1 issues:

# Loops accessing related objects
grep -rn "for.*in.*\.objects" --include="*.py" .
grep -rn "\.filter\|\.get\|\.all" --include="*.py" .

Performance Checklist

Reference the performance_context.txt file for detailed patterns including:

• N+1 query detection
• select_related() for foreign keys
• prefetch_related() for reverse relations and many-to-many
• Common Canvas SDK data model relationships
• Anti-patterns to avoid