agency-performance-benchmarker

Define stages in the k6 options object specifying duration and virtual user targets, then write a default function that issues HTTP requests against your endpoints. Add thresholds like p(95) response time under 500ms and error rate under 1% to enforce pass/fail criteria.

Improve LCP below 2.5 seconds through code splitting, lazy loading, and CDN asset delivery. Reduce CLS below 0.1 by reserving layout space for dynamic content, and keep FID under 100ms by minimizing main-thread JavaScript blocking.

Load testing validates performance under expected normal and peak traffic levels, while stress testing pushes the system beyond capacity to find breaking points and observe recovery behavior. Both use staged ramp-up patterns but target different objectives.

Results vary due to network conditions, shared infrastructure noise, and insufficient sample sizes. Use statistical analysis with confidence intervals, run tests under realistic conditions simulating actual user behavior, and establish baselines before comparing optimizations.

Add performance regression testing to CI/CD once you have established baselines and SLA thresholds. Automated quality gates compare each build against performance budgets, catching regressions before deployment rather than after users report slowdowns.