DEV.co
Performance Optimization

Make it fast — and prove it with numbers.

Slow pages cost conversions; slow APIs cost infrastructure. We profile the real bottlenecks, fix them at the root, and show the before-and-after in metrics that matter.

Core Web Vitals · API latency · database tuning · measurement-driven · proven gains

Guessing at performance wastes money.

Most 'optimization' is cargo-culting tips that don't move the needle. Real performance work starts with measurement, because the bottleneck is rarely where you think.

We profile your actual application under real load, find where the time and money actually go — the N+1 query, the unindexed lookup, the 1.9MB bundle, the blocking third-party script — and fix those. Then we measure again, so the win is a number, not a hunch.

Show, don't tell

Bottlenecks found, fixed, and measured.

A representative before-and-after from a single optimization engagement.

results.txtbash
# Before  →  after a performance engagementLCP (largest contentful paint)   4.8s1.1sAPI latency (p95)                920ms  →   140msDB query count per request       3403      (N+1 fixed)JS bundle (gzipped)              1.9MB  →   410KB
Business impact
faster pages → higher conversion + SEO
lower latency → smaller infra bill
measured before/after, not guessed

We instrument first so every change is attributable — you see exactly what each fix bought you.

Where the time usually hides.

Frontend

Core Web Vitals

LCP, CLS, INP — bundle size, images, render-blocking resources, hydration.

Backend

API latency

Slow endpoints, blocking I/O, missing caching, and serialization overhead.

Data

Database tuning

N+1 queries, missing indexes, slow joins, and connection-pool issues.

Network

Caching + CDN

Edge caching, HTTP caching headers, and asset delivery.

Cost

Infra efficiency

Right-sizing, autoscaling, and cutting wasted compute spend.

Scale

Load + concurrency

Finding the breaking point and the cheapest way to raise it.

Measurement-driven

We profile before we touch a line.

Optimization without measurement is superstition. We baseline your real workload, find the actual hot paths, and fix those — not the ones that feel slow.

Then we re-measure and report the delta, so you know the engagement paid for itself.

Get a performance audit

Ways to engage.

Performance Audit
3–5 days
from $6,000
  • Profiling under real load
  • Prioritized bottleneck report
  • Quantified opportunity
Start an Audit
Optimization Sprint
2–4 weeks
from $24,000
  • Fix the top bottlenecks
  • Frontend + API + database
  • Before/after benchmarks
Start a Sprint
Ongoing
monthly
from $6,000/mo
  • Continuous performance budget
  • Regression monitoring
  • Quarterly deep dives
Set It Up

Common questions.

How do you know what to fix?
Profiling and real-user monitoring. We measure where time and resources actually go before changing anything, so we fix the bottleneck that matters, not the one that's easy.
Will you prove the improvement?
Yes — we baseline before and benchmark after, and report the change in the metrics you care about.
Can this lower our cloud bill?
Often, yes. Faster code and right-sized infrastructure frequently cut compute spend alongside improving speed.
Does performance affect SEO?
Directly — Core Web Vitals are a ranking factor, and faster pages convert better too.

Find out where your milliseconds go.

Point us at the slow app or endpoint. We'll profile it and tell you what's actually costing you.