Performance and slowness

Slow UI, slow endpoints, timeouts, or high consumption.

When to use

• UI slow to load lists and forms.

• API timeouts.

• Slowness only in one environment (e.g., Prod).

Quick checklist (2 min)

1. Compare Dev vs Staging vs Prod.

2. Test with a “clean” user (without much data).

3. Isolate: is it UI, API, or database?

Diagnosis

1) Is it client-side or server-side?

• Client-side: high CPU in the browser, heavy rendering.

• Server-side: slow requests in Network, high time-to-first-byte.

2) Data and queries

• Lists without pagination tend to degrade quickly.

• Filters and sorts may require indexes.

3) Integrations

• Do calls to external services block the main request?

• Are timeouts configured?

How to resolve (patterns)

• Slow lists: pagination, mandatory filters, reduce columns.

• Slow API: review critical endpoints and queries.

• Database: indexes, avoid N+1, review recent migrations.

When to escalate

• SLA affected in Staging/Prod.

• Abrupt degradation after release.

• Frequent and repeatable timeouts.