Color
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Caption
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Description
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Blocked
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The Blocked time includes any pre-processing time (such as cache lookup) and the time spent waiting for a network connection to become available. By default, IE allows only two outstanding connections per host name when talking to HTTP/1.1 servers or eight-ish outstanding connections total. Firefox has similar limits. Often the block time is the most significant factor in the time to download images embedded in the website.
"Blocked" is available only in IE Add-on Edition
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DNS Lookup
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DNS Lookup represents the DNS Lookup time. It's the time that required to query a DNS name server to look up and find IP address information of computers in the internet. For example, resolve a host name (e.g. www.ieinspector.com) into a numeric IP address (e.g. 203.22.204.73).
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Connect
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Connect represents the TCP level connection time. It's the time that a new TCP level connection was established with web server(s) . If a secure HTTPS connection is being used this time includes the SSL handshake process. "Keep-alive" HTTP connections allow multiple requests to be send over the same TCP connection, and in some cases have been shown to result in an almost 50% speedup in latency times for HTML documents with lots of images.
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Send first to last
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Send represents the time required to send the HTTP request message to the server. This value will depend on the amount of data that is sent to the server.
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Wait
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Wait is the idle time taken to receive a response message from the server. This value includes network delay time and web server processing time.
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Receive first to last
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Receive is the time that receive the response message from the web server. This value will depend on the size of the return data, network bandwidth, as well as whether or not to use the HTTP compression method.
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Cache Read
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Cache Read is the time taken to read the content from the browser cache during (Cache) or 304 responses.
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