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Asked: 2026-05-13T19:51:02+00:00

YSlow , dynaTrace , HTTPWatch , Fiddler ……… All these things are really good

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YSlow, dynaTrace, HTTPWatch, Fiddler ………

All these things are really good for measuring the performance of the website and get statistics for the same. YSlow is really cool, offers good guidelines also.

However, i am very confused with so many things around (Though it’s good that people already invested time and have made nice guidelines to follow and i thank them for great work done).

Following are my questions:

  1. How much accuracy these tools have in terms or numbers they show ?
  2. Which one(tool) is BEST to use (one for all needs)? Or i am missing name of some tool which is out of box and better than above all?
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  1. Editorial Team

    I’m suprised that you haven’t mentioned JMeter. It is free, quite easy to use, has lots of features, and great for load testing your website.

    As for question one, I’m not sure I can answer that. I’m sure that in general, the numbers these tools show are pretty accurate, but there are some catches. Take JMeter for example:

    • JMeter itself uses a lot of memory and also some substantial CPU time if you do some heavy load testing. That means that if you run the tool on the same machine as your website, some resources are lost, e.g. not available for the website
    • Testing it on the same machine does not out-of-the-box take in account that the data has to be sent over the internet connection, so response times are lower then the reality.

    But in all, I think you should never blindly trust the results these tools give you, but they can give you a good insight into possible bottlenecks or problems.

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