Service

Pages that finish loading before the visitor decides to leave.

Rendering strategy, caching, script budget, and asset weight, worked until the numbers hold on the devices the traffic actually uses. The target is field data from real visits. A green score on a developer’s laptop proves very little.

Core Web Vitalsfield · p75
LCP
INP
CLS
Real visits, real devices.FieldLab
Measured on the deployed buildIllustrative
Performance engineeringIllustrative panel

Focus

Rendering, caching, scripts, assets, and Core Web Vitals in the field.

Rendering & cachingScript budgetField Core Web Vitals
Service
Performance engineering
Deliverables
Named and scoped below
Bought as
A defined build, or run under management
Ownership
Every account and platform stays in the client’s name
Core Web Vitalsfield · p75
LCP
INP
CLS
Real visits, real devices.FieldLab
Measured on the deployed buildIllustrative
Fig. 01 · Measured in the fieldIllustrative panel

Measured in the field

Field data from real visits decides whether the work is done. Lab scores are useful for finding causes and useless for declaring victory.

Storefrontprod build

Product

In stockAdd
Core Web Vitals
LCP1.2s
CLS0.01
INPpass

Fast is a requirement, measured on the deployed build.

Measured on deploy, not on localhostIllustrative
Fig. 02 · Rendering and caching, decided on purposeIllustrative panel

Rendering and caching, decided on purpose

What is static, what streams, and what runs on the client is a decision with a reason behind it, cached at the edge, the data layer, and the browser.

Architecture reviewrev A
FindingsBlockingCosts time
Conversion tracking fires twice01
Legacy paths have no redirect map02
Tag manager renders ahead of content03
Service pages carry no structured data04
Recommendationscope · sequence · cost
Ranked by what it costs to leave aloneIllustrative
Fig. 03 · Every third-party script has an ownerIllustrative panel

Every third-party script has an owner

Tags accumulate because nobody is accountable for the cost of one more. Each script gets weighed, assigned, and removed when it cannot justify the milliseconds.

Scope

What gets built.

Rendering strategy: what is static, what streams, what runs on the client
Caching at the CDN, the data layer, and the browser
Third-party script audit, with a weight and an owner recorded for each one
Image, font, and bundle work with explicit dimensions and real subsetting
Validation on the deployed build against field data, not a local run
DeliverablesScoped in writing before work starts

Outcome

What changes.

Core Web Vitals pass on the devices the traffic actually arrives on.

Scripts stop being added without anyone accounting for what they cost.

Speed becomes a build requirement with a number attached instead of a cleanup task.

Structural changeNo performance figure is claimed

More

The other focused engagements.

Start

Start with what’s broken.

Send the situation in a paragraph. Strygon comes back with a read on what’s likely wrong and what it would take to fix, before anyone talks about price.

Most builds start withleads dying in an inbox., three half-finished pipelines., follow-up nobody owns., numbers that never agree., four vendors blaming each other.

What to send
A paragraph. What broke, and where it shows up.
What comes back
A read on what is likely wrong and what fixing it takes.
Price
The last conversation, not the first