Calendar Renderer Stress Test

Salon configuration

Staff columns

51540

Appointments per staff per day

52060

Simulated API latency

200ms1,200ms3,000ms

Overlap density

Results

Total events

—

Layout solve

—

Viewport cull

—

Canvas paint

—

Time budget breakdown

API fetch Layout solve Viewport cull Canvas paint

Canvas render preview

Verdict

Context: Our FullCalendar v7 spike measured 1–1.5s for API data fetching and 400–600ms for DOM rendering. This harness isolates the client-side rendering pipeline to show what a canvas-based approach could achieve. The API latency slider simulates the server round-trip to show the full picture.