Why Software Gets Slow, and How to Fix It

Software that was fast at launch often becomes slow as data, users, and features grow. Slowness frustrates users, reduces conversions, and increases infrastructure costs. The good news is that most performance problems have identifiable causes.

Common causes

• Database queries that do not scale with more data, often due to missing indexes
• Loading far more data than a screen needs
• Large images, scripts, and fonts on web pages
• Too many requests between the browser and server
• Heavy work done while the user waits instead of in the background
• Slow third-party services in the critical path

Measure before fixing

Guessing wastes time. Performance work starts with measurement: which pages or actions are slow, for which users, and where the time is spent. Monitoring tools and profiling reveal the real bottlenecks.

Fixes that often help

• Add database indexes and optimise slow queries.
• Cache results that are requested repeatedly.
• Paginate long lists and load data on demand.
• Compress and resize images and load them lazily.
• Ship less JavaScript to the browser.
• Move slow tasks such as emails and reports to background jobs.
• Use a content delivery network for static files.

Prevent regressions

Set performance budgets, monitor key pages continuously, and test performance when significant changes are made.

Speed is a feature. Users notice it even when they cannot describe it.

Performance and cost

Efficient software often costs less to run, because it needs fewer servers to handle the same load.

MOKRIN diagnoses performance problems with real measurements and fixes the causes, from database queries to frontend loading, with monitoring to keep things fast.