---
title: "Lazy loading (Help Center / Filters / Metric)"
ai_context: "Use this article for questions about the RUMvision Lazy loading filter, identifying whether an image-based Largest Contentful Paint (LCP) resource is being delayed by native, CSS-based or JavaScript-based lazy-loading behavior. It explains how the filter helps investigate LCP Resource Load Delay, find URLs or templates where the LCP image starts loading too late, and distinguish correctly prioritized above-the-fold images from lazy-loaded LCP candidates. Relevant for questions about `loading=\"lazy\"`, lazyload libraries, above-the-fold images, LCP discovery delay, slow hero or product images, template-level lazy-loading issues and determining whether lazy loading is contributing to poor LCP performance."
canonical: "https://www.rumvision.com/help-center/filters/metric/lazy-loading/"
---

Breadcrumbs: [Home](https://www.rumvision.com/?format=md) > [Help Center](https://www.rumvision.com/help-center/?format=md) > [Filters](https://www.rumvision.com/help-center/filters/?format=md) > [Metric](https://www.rumvision.com/help-center/filters/metric/?format=md) > Lazy Loading

# Lazy loading

> This filter works with the [Largest Contentful Paint metric](https://www.rumvision.com/help-center/glossary/metrics/largest-contentful-paint/?format=md)

This filter will indicate whether the LCP resource appears lazy-loaded, based on native loading attributes or (CSS/JS) lazy-loading patterns. Use for LCP Load Delay. Lazy-loaded LCP images usually start too late.

Although lazyloading above-the-fold images can be good practice, lazyloading your Largest Contentful Paint candidates certainly is not. With this filter, you can easily see which URLs and/or templates an LCP image is lazyloaded on.

[![lazyload-filter.png](https://www.rumvision.com/file/upload/img/lazyload-filter.png)](https://www.rumvision.com/file/upload/img/lazyload-filter.png)