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# Tapping a Variant Took 480ms to Do Anything
- URL: https://debugly.dev/shopify-inp-variant-selector-main-thread/
- Published: 2026-10-09T13:07:00.000Z
- Updated: 2026-10-17T05:48:21.000Z
- Description: INP replaced FID and it is much harder to pass. A variant selector that felt fine on a laptop was failing badly on the phones customers actually use.
- Author: Rohit Bhadani
- Tags: Shopify, Deep Dive, Performance, JavaScript

|             | Before     | After     |
| ----------- | ---------- | --------- |
| Input delay | 40 ms      | 35 ms     |
| Handler     | 310 ms     | 12 ms     |
| Paint       | 130 ms     | 28 ms     |
| **INP**     | **480 ms** | **75 ms** |

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Published on [debugly.dev](https://debugly.dev/) by [Rohit Bhadani](https://debugly.dev/about/) | Founder of [Krova Cloud](https://krova.cloud/?ref=debugly.dev)