Shopify handles a lot of performance basics automatically — most remaining speed problems come from what's been added on top of the platform.
Every installed app adds its own scripts. Stores running a dozen apps are often carrying real, measurable speed debt that nobody's reviewed in years.
Full-resolution photos uploaded without compression are as common a problem on Shopify as anywhere else.
Extensive custom code layered onto a theme, especially by multiple developers over time, tends to accumulate redundant or conflicting scripts.
Apps installed for a specific campaign or season often stay active long after they're needed — a periodic review catches this before it compounds.
Find out what's actually slowing your store down.
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