After a domain migration, test both the new website and the old entry paths that still bring visitors to it. A new homepage can be fast while old product links, assets or campaign URLs take a slow and confusing route to the destination.
Google's site-move guidance emphasizes mapping old URLs to appropriate new destinations and using redirects for the move. [1] Add a performance review to that migration plan so the correct destination is also reached efficiently.
Preserve a pre-migration baseline
Before changing domains, record representative routes and their important interactions. Include popular content, signup, pricing, images and links shared through directories. Save the measurement conditions and build version, not just a screenshot of a score.
Separate changes caused by the domain move from changes caused by a redesign. When both happen together, a faster or slower result cannot automatically be attributed to the new domain. Keep a change log that describes hosting, CDN, application and content changes.
Test old-to-new journeys
Open an old product URL, an old blog URL and a campaign link with parameters. Record each redirect and its destination. A useful migration preserves the visitor's intent rather than sending every historical URL to the homepage.
Inspect whether parameters needed for your own campaign analysis survive appropriately. Do not preserve arbitrary parameters without understanding them, especially when they contain sensitive information. The objective is a deliberate redirect policy, not blind copying of every query string.
Inspect asset and API dependencies
Check for references to the old domain in scripts, images, stylesheets and application calls. A page can render while quietly requesting resources from an old host that is about to be retired. Examine failures as well as the requests that eventually succeed.
Review caching and compression configuration on the new serving path. Verify certificates and hostnames operationally with your infrastructure team. A domain migration can expose configuration differences even when the application code is unchanged.
Test login and signup separately
Authentication, cookies and external callbacks may be affected by a domain change. Use authorized test accounts and the provider's current documentation to verify the intended flow. Do not solve a migration problem by weakening authentication protections.
Measure the time to complete the first useful action after arriving through an old link. A visitor may experience a redirect, a consent step and another redirect before reaching the application. That end-to-end delay matters even when each individual page looks acceptable in isolation.
Compare like with like
Run the same scenarios before and after the move. Keep mobile and desktop results separate and preserve failed observations. Report which paths improved, which regressed and which could not be compared because the content or workflow changed.
An illustrative report might find that the new homepage is unchanged but old article links take an unnecessary extra hop. The action is to simplify that route, not to redesign the new homepage. A path-level report turns a broad migration concern into a specific fix.
Update discovery records
Review your IndieTools product listing and other public references after confirming the canonical destination. A directory entry should describe the current product and send visitors to the intended website; public listings are part of the migration inventory, not a substitute for server redirects. IndieTools provides product discovery alongside its category collections. [2]
Retain the former name in explanatory copy when it genuinely helps existing users recognize the product. Avoid creating duplicate listings merely to keep both names visible. Record the acquisition or rebrand history accurately rather than making the old identity disappear without explanation.
Does a domain change inherently improve speed? No. Serving configuration and the visitor's route determine the result.
Can all old URLs redirect to the homepage? Map meaningful destinations instead of treating every old intent as interchangeable.
When is the review complete? When representative old and new journeys work, performance regressions have owners, and monitoring can detect remaining failures after the move.
Explore related IndieTools resources: weekly website speed measurements and reported technology collections.
Continue your research
- Backlink Attribution After Changing Domains
- AI Search Brand Confusion After a SaaS Rebrand
- Compare Website Speed Across Countries Fairly
Sources and verification
Sources consulted for this article on October 1, 2026. Product capabilities are documented claims unless an actual test is explicitly described.
