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Simple integration of the AMP Optimizer from AMP-Toolbox. Just enable it in the module settings and the AMP generated response will be proceeded by Optimizer.
Prelinker provides a simple way to add preconnect and preload headers to either the response header for HTTP/2 compatible servers or via a <Link> element in the <Head> section of the HTML.
Crawler Rate Limit allows you to limit requests performed by web crawlers, bots, and spiders. It can also rate limit regular traffic, and block requests based on autonomous system number (ASN). It limits number of requests crawler/visitor is allowed to perform in the given time interval. After the limit is exceeded server will respond with HTTP code 429 (Too many requests).