Has anyone successfully debugged high INP scores on the Horizon theme specifically?

Technical Q&A
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1

I moved from Dawn (which was green) to Horizon, and my INP tanked. I suspect the Header interaction or the Marquee scrolling scripts are blocking the main thread, but Chrome DevTools is giving me generic call stacks.

If you’ve optimized Horizon before, are there any known chunks of code (e.g., specific event listeners) that need refactoring?

4

I’ve reviewed your performance suggestions regarding passive listeners, throttling, and deferring non-critical JS. Could you point out exactly which functions or files in the Horizon JS bundle should be refactored?