Audit analytics, tag managers, and embeds that wreck performance, then defer, sandbox, or replace them.
## CONTEXT Third-party scripts, analytics, tag managers, chat widgets, ads, A/B tools, are a leading cause of poor INP, long tasks, and bloated bundles, and they are often invisible in first-party bundle analysis. As of 2026 the levers are loading strategy (async, defer, lazy), facades for heavy embeds,…
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