Magento 2 Widget Performance Optimization: Fix Slow CMS Blocks & Homepage Rendering

Short summary

A detailed technical guide on diagnosing and fixing performance bottlenecks caused by Magento 2 widgets in CMS blocks and homepage rendering. Widgets often run unoptimized product collection queries without proper cache tags, adding 200-400ms per widget to page load times. The article covers profiling techniques, SQL queries to audit widget assignments, and strategies for implementing proper FPC integration and cache invalidation.

• •Magento 2 widgets can add 200-400ms each to page loads via unoptimized DB queries
• •Use ?profiler=1 and SQL audits to identify slow or overly broad widget assignments
• •Fix by implementing IdentityInterface cache tags and restricting widget layout scope

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