Improve the real or perceived speed of the site, or monitor performance metrics.
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Sends pages in a way that allows browsers to show them much faster. First sends the cacheable parts of the page, then the dynamic/uncacheable parts.
"Block Proxies" is a Module to block unwanted connections from Stranger IPs (Blacklisteds on DNSBL), Anonymous Proxies or many more
Integrates with Sentry application performance monitoring and error tracking platform (sentry.io).
The Widget On Demand module provides widgets for form elements which should be loaded on demand.
Service Workers are a new browser feature that provide event-driven scripts that run independently of web pages.