HubSpot CMS Performance: Unmasking and Deleting Stubborn Legacy Scripts

Hey ESHOPMAN community! Ever felt like you're playing a high-stakes game of hide-and-seek with your website's code? Especially when it comes to those sneaky legacy scripts that cling on after a migration, silently sabotaging your site speed? We’ve all been there. Today, we're diving into a fascinating (and frustrating!) real-world challenge pulled straight from the HubSpot Community, focusing on how to track down and eliminate those stubborn, speed-killing `ga.js` scripts.

For any e-commerce business running on HubSpot, site speed isn't just a nice-to-have; it's a make-or-break factor for conversions, user experience, and your search engine rankings. A slow site can mean abandoned carts, frustrated customers, and lower visibility. That's why when a community member flagged an issue with ancient Universal Analytics scripts loading from an inaccessible 'HubSpot Migration Assets' block, it immediately caught our attention.

The Ghost in the Machine: Legacy GA.js Scripts

The original poster shared a classic dilemma: their HubSpot site was loading two legacy Universal Analytics scripts (https://ssl.google-analytics.com/ga.js) with specific UA IDs. These weren't just old; they were loading from a dead endpoint since Google officially shut down Universal Analytics in July 2024. The kicker? These scripts were buried deep within a comment block in the live page source, marked , making them seemingly untouchable.

The impact was significant: page load times soaring over 14 seconds, far from the target of under 5.3 seconds. The original poster had tried everything a savvy HubSpot user would:

• Unchecked GA3 integration in Settings > Pages > All Domains > Integrations.
• Scoured all Design Manager templates.
• Checked site-wide footer HTML.
• Queried HubSpot API (cms/v3, content/v2).
• Submitted multiple support tickets without a response.

This is the kind of problem that makes you pull your hair out, especially when you know it's a backend artifact beyond your control – or so it seems.

Community to the Rescue: A Deep Dive into HubSpot CMS

While HubSpot support was quiet, another community member jumped in with some expert detective work. They noted that the elusive `` block didn't appear on the live pages they checked but did show up on the 404 page. This small detail hinted at a more specific location for the rogue code.

The core insight? HubSpot's migration service might have tucked these scripts into less obvious places:

1. Modules or Separate Files: The scripts might be included in a module or a separate file that's then loaded into a different core file, like base.html.
2. Standard Includes: They could be hiding within HubSpot's system-level includes, specifically {{ standard_header_includes }} or {{ standard_footer_includes }}. These tags are powerful, pulling in various scripts and assets, and sometimes, legacy code can get caught in their net.
3. Specific File Inclusions: The community member suggested looking at what comes *after* a known JavaScript file (e.g., template_PCMethods_Nov2014-main.min.js) in files like base.html or 404.html. If you see something like this:

   {{ require_js(get_asset_url("some/path/to/template_PCMethods_Nov2014-main.js")) }}
   {{ standard_footer_includes }}

   ...then the script is likely getting pulled in by the {{ standard_footer_includes }} tag.

   However, if it looks like this:

   {{ require_js(get_asset_url("some/path/to/template_PCMethods_Nov2014-main.js")) }}
   {{ require_js(get_asset_url("some/path/to/a/different/file")) }}

   ...the code is likely within that second, explicitly required file. Removing that specific require_js line would be the solution.

4. Domain-Specific Settings: A crucial point raised was to check settings for all domains, not just a specific one. Legacy code might be set for an older or less-used domain, inadvertently affecting other parts of the site. You can check this in HubSpot settings under app.hubspot.com/l/settings/website/pages/all-domains/page-templates.

   

Actionable Steps for HubSpot Users and RevOps Teams

If you're facing a similar issue with rogue scripts, here’s a battle plan:

1. Access Your Design Manager: Navigate to Marketing > Files and Templates > Design Tools.
2. Inspect Core Templates: Open your primary base.html and 404.html templates. These are often the central hubs for site-wide inclusions.
3. Search for Standard Includes: Look for {{ standard_header_includes }} and {{ standard_footer_includes }}. While you can't directly edit what these tags inject, knowing they are present suggests the script might be coming from a HubSpot system setting rather than a template file you can directly modify. If this is the case, double-check your HubSpot Integrations settings for any lingering analytics connections.
4. Trace require_js Calls: Systematically examine any {{ require_js(...) }} calls. If one points to a file that could contain your legacy GA code, open that file and remove the offending lines.
5. Review Domain-Specific Settings: Go to Settings > Website > Pages > All Domains > Integrations. Ensure that Universal Analytics (GA3) is unchecked for *all* listed domains, not just your primary one. Sometimes, old settings on a sub-domain or a staging domain can cause unexpected inclusions.
6. Test, Test, Test: After making any changes, clear your cache and thoroughly test your site's performance using tools like Google Lighthouse to confirm the scripts are gone and page load times have improved.

ESHOPMAN Team Comment

This community discussion highlights a critical point for any HubSpot-powered e-commerce business: the need for diligent code hygiene, especially after migrations. Relying solely on UI settings isn't always enough; sometimes, you need to dig into the raw template code. The community's approach of systematically checking common inclusion points is exactly what we recommend for troubleshooting such elusive issues. This problem underscores the importance of a clean, fast storefront for conversions, a core philosophy at ESHOPMAN.

Tackling hidden scripts might feel like a developer's task, but understanding where these issues can hide is crucial for any RevOps professional or marketer who values site performance and data accuracy. By proactively cleaning up legacy code, you're not just improving page speed; you're ensuring your analytics are clean, your user experience is smooth, and your e-commerce engine is running at peak efficiency. Keep those HubSpot portals lean and mean!