HTTP simultaneous connections per host limit… are per tab, browser instance or global?
问题 According to the HTTP Specification (w3.org/Protocols/rfc2616/rfc2616-sec8.html#sec8.1.4), HTTP clients should limit their connections: Clients that use persistent connections SHOULD limit the number of simultaneous connections that they maintain to a given server. A single-user client SHOULD NOT maintain more than 2 connections with any server or proxy. Different vendors implement this limit differently: http://www.stevesouders.com/blog/2008/03/20/roundup-on-parallel-connections/ But. does