performance
Practical resources about performance for software engineers.
103 results
Optimizing for Speed and Efficiency
Performance is a feature. Slow applications lose users, increase infrastructure costs, and create a poor developer experience. Profiling, benchmarking, and systematic optimization are essential skills for senior engineers.
This section covers profiling techniques, database query optimization, frontend bundle analysis, memory leak detection, and latency reduction strategies. Each guide includes measurable targets and before/after benchmarks.
Load Testing APIs with k6 and Threshold-Based Assertions
How to write and run load tests with k6 to measure API performance, validate SLOs, and identify...
Optimize Slow Database Queries
How to identify, analyze, and fix slow SQL queries using EXPLAIN, query refactoring, and...
SPA Performance: Code Splitting and Lazy Loading
Improve single-page application load times by splitting bundles at route and component level,...
Web Performance Optimization
Improve Core Web Vitals, reduce bundle sizes, and optimize frontend performance with lazy loading,...
Distributed Rate Limiting with FastAPI and Redis
Implement distributed rate limiting in FastAPI using Redis sliding window and token bucket...
Reduce AWS Lambda Cold Start with Provisioned Concurrency
Minimize Lambda cold start latency using provisioned concurrency, ARM64 Graviton, lighter...
Compute Resource Consolidation Pattern
Combine workloads into fewer compute resources to reduce cost, improve utilization, and simplify...
Back-Pressure Pattern
Stop fast producers from overwhelming slow consumers by pushing flow-control signals back through...
Content Delivery Network (CDN) Pattern
Distribute static and live content through geographically dispersed edge servers to reduce latency,...
Eager Loading Pattern: Fix the N+1 Problem
Load related data in a single query rather than multiple round-trips, preventing the N+1 problem...
Flyweight Pattern for Efficient Large-Scale Object Sharing
Use the Flyweight pattern to minimize memory usage by sharing as much data as possible between...
Proxy Pattern for API Response Caching
How to implement a caching proxy that intercepts API calls and stores responses to reduce latency...
Shed Load Pattern
Drop requests proactively under extreme load to protect the system. Reject excess traffic before it...
Throttling Pattern
Limit the rate at which a system processes requests or consumes resources to prevent overload,...
GraphQL Batched Resolver Pattern
Resolve nested GraphQL fields in a single batched request to eliminate N+1 queries and reduce...
GraphQL DataLoader Pattern
Coalesce individual load requests into batched calls with per-request caching to prevent N+1...
API Rate Limiting Policy Template
A template for defining API rate limits per consumer tier, including burst allowances, quota...
Load Test Execution Plan Template
A template to plan, execute, and document load tests that measure system behavior under realistic...
Frontend Performance Budget Template
A template for defining JS, CSS, image, and font budgets per route — with a method for picking the...
Core Web Vitals Audit Checklist
Checklist for auditing Core Web Vitals per page: LCP optimization steps, INP interaction tuning,...
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