tcprstat is a free, open-source TCP analysis tool that watches network traffic and computes the delay between requests and responses.
tcprstat is related to the tcpstat tool, but it focuses on response time measurements, not on the amount and size of the network traffic. This makes it useful for response time analysis, which is needed for techniques such as Goal-Driven Performance Optimization.
The advantages of tcprstat are as follows:
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It is lightweight and unobtrusive. No bulky log files need be written and analyzed.
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Requests and responses are timed with microsecond resolution.
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The output is easy to import into spreadsheets, manipulate with command-line scripts, graph with gnuplot, and so on.
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It is protocol-agnostic, and works well for a large variety of client-server protocols that have a simple request-response model.
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