AWS quantifies the browser-agent tax: 10-30 seconds and a big cost multiple per page fetch

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In a walkthrough of automated web insight extraction, AWS states plainly that each AgentCore Browser session takes 10-30 seconds and costs significantly more than a standard HTTP request, making URL-hash deduplication 'essential to keep costs manageable.' The reference design leans on cheaper primitives around the expensive part — EventBridge polling RSS every 15 minutes, SQS decoupling collection from processing, HTML preprocessing to cut tokens before the LLM sees anything. It also flags that OpenSearch Serverless carries a minimum capacity charge regardless of usage and suggests RDS with pgvector for lower-volume builds.