Head-Of-Line Blocking

Head-of-line blocking (HOL blocking) in computer networking is a performance-limiting phenomenon that occurs when a line of packets is held-up by the first packet, for example in input buffered network switches, out-of-order delivery, and multiple requests in HTTP pipelining.
Posts about Head-Of-Line Blocking
  • HTTP/2: A Fast, Secure Bedrock for the Future of SEO

    …. This also prevents what is known as head-of-line blocking: when a large/slow resource (say for example a 1 MB background image) blocks all other resources from downloading until complete. Under HTTP, browsers would only download one resource at a time per connection. HTTP/2's multiplexing approach allows browsers to download all those other 5 KB…

    Moz Blogin SEO- 15 readers -
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