I really need a resolution as soon as possible.Īn example of the error encountered (for a book where metadata download had previously worked) is: I am currently relying on Windows Defender which is not my optimal preference. I uninstalled Kaspersky and the metadata downloads work perfectly. This applied to all iterations of Calibre Portable. Enabling Kaspersky would cause the metadata download to fail. With an previously unused version of Calibre it would work if Kapersky was disabled. It would work the first time an earlier release was used but subsequent attempts at metadata download would fail with the same results. After a period of evaluation of potential probable causes I tried using earlier versions of Calibre. The remote host would reject the attempt to download the metadata and terminate the connection. This applied to metadata downloads from Amazon, Google and Good reads. Only when recording in a stable environment, under the same conditions, we’ll be able to draw confident conclusions about our site’s performance.I recently started having failures on Calibre Metadata download for books. When observing performance data, it’s important to establish a baseline and compare it in relativity to historic results. Based on the factors described above, it’s impossible to make any form of informed comparison.
Should we be comparing metrics obtained from different tools? In order to return results fast, PageSpeed runs at full network speed, then applies a simulation to calculate performance metrics.Ĭalibre applies bandwidth and device throttling as it conducts the testing-metrics are recored in realtime. Both Calibre and PageSpeed use different types of machines. The underlaying hardware running performance tests has an effect on the accuracy of simulated hardware devices. PageSpeed tests under two different network speeds: Desktop (described as “Dense 4G 25th percentile”) and mobile (described as “Mobile Slow 4G”).ĬPU and GPU performance of the test agent They’re chosen based on their relevance to observed global averages. Test Profiles allow you to choose from a list of pre-configured network throttling settings.
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