Google Analytics vs Google tag (gtag.js): which slows a Shopify store more?
Google Analytics is usually the lighter of the two. On the typical store it was light, while Google tag (gtag.js) was heavy.
Both are analytics apps. We measured Google Analytics on 61 Shopify ecommerce stores and Google tag (gtag.js) on 559.
Side by side
| App | Typical processing time | Stores measured |
|---|---|---|
| Google Analytics | Light (under 100 ms) | 61 |
| Google tag (gtag.js) | Heavy (300 ms to 1 second) | 559 |
Google Analytics was light on 95% of the stores it was measured on. Google tag (gtag.js) was heavy on 75% of the stores it was measured on.
On stores that run both
60 of the stores we checked load both. Google Analytics took less processing time than Google tag (gtag.js) on 58 of them.
Each band is an app's typical processing time across the stores it was measured on. Those stores differ from app to app. That makes the result on stores that run both the fairer test. Apps found on fewer than 20 stores aren't listed yet. The list grows as more stores are checked.
All apps in the index · How we measure these numbers
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