11 July 2022

Keeping Gatsby Build Times Under Control

Hero image for 'Keeping Gatsby Build Times Under Control.' Image by Luiza Camargo.

Gatsby build time is easy to ignore while a site is small.

Then content grows. Images grow. More source plugins are added. More pages are created. Preview builds get slower. Editors start asking whether the publish button worked. Developers stop running clean builds locally because they take too long.

At that point, build time is not just a developer inconvenience. It is part of the publishing experience.

Start by Measuring the Build

Do not optimise a Gatsby build from memory.

Record:

total build time
time spent sourcing data
time spent creating pages
time spent processing images
time spent running GraphQL queries
time spent in plugins
deployment platform timings

Gatsby's guide to improving build performance is a useful reference because build time usually has several causes rather than one obvious villain.

Control Data Volume

Static builds have to process the data they receive.

If the site sources thousands of entries, unused fields, old content types, remote assets, and draft data that never appears on the site, the build pays for that noise.

Check:

whether source plugins fetch only needed content
whether old content types still appear in GraphQL
whether draft or archived entries are excluded correctly
whether large remote datasets can be narrowed
whether pages are created only for valid public routes

The earlier article on keeping Gatsby builds predictable covers the reliability side. Build time is the same theme with a stopwatch attached.

Watch Image Processing

Image work is often one of the most expensive parts of a Gatsby build.

Large source images, many derivatives, remote downloads, and repeated transformations can add up quickly. The article on optimising `gatsby‑image` even further covers output detail, but build‑time cost needs its own attention.

Ask:

are source images much larger than needed?
are too many image sizes generated?
are remote images cached effectively?
are unused images processed?
are image plugins configured consistently?

Better image discipline helps users and build systems.

Keep GraphQL Queries Focused

Gatsby's GraphQL layer is powerful, but broad queries can create unnecessary work.

Templates should query the data they need. If a page only renders a title, slug, date, and summary, it should not fetch large rich text bodies, image data, and unrelated references for every item in a listing.

The article on Gatsby and GraphQL nodes versus edges is useful background for understanding the shape of Gatsby query results.

Audit Plugins Regularly

Plugins can hide build cost.

Some source data. Some transform assets. Some generate files. Some run during multiple lifecycle stages. A plugin added for one feature may keep running long after that feature has changed.

Review:

plugin purpose
configuration
version compatibility
build timing
generated output
whether the plugin is still needed

Removing a plugin can be more valuable than tuning it.

Make Publishing Expectations Realistic

If editors publish content through a CMS, build time affects them directly.

A five‑minute build may be fine for occasional publishing. It may be painful for frequent content updates, preview workflows, or campaign launches.

Be clear about:

expected build duration
what triggers a build
how failed builds are reported
whether previews take the same time
whether urgent fixes have a faster path

If those checks no longer change the trajectory, the question becomes whether optimisation is still the right work. Gatsby build times are slow: fix or migrate? covers that decision more directly.

Wrapping Up

Gatsby build time is a product and workflow concern, not only a local development concern.

Measure the build, reduce unnecessary data, keep image work under control, focus GraphQL queries, audit plugins, and explain publishing delays clearly. A fast static site should not require a painfully slow publishing process.