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<blockquote data-quote="Andy Ful" data-source="post: 948581" data-attributes="member: 32260">Saying so is somewhat misguiding. The case is more complicated. In fact, when taking into account also the benchmarks of AV-Test and MRG Effitas, we can see that Defender benchmarks are much better than for average AV.Let's look into the last Performance Test (April 2021) made by AV-Comparatives. There are only a few AVs (Eset, K7, Microsoft, Total Defense) that scored the maximum in the activities most important to average users: &quot;Launching Applications&quot;, &quot;Downloading Files&quot;, &quot;Browsing Websites&quot;. These activities take over 99% of the time.It is true that Microsoft is the slowest AV (in this test) for such activities as &quot;File copying&quot;, &quot;Archiving / Unarchiving&quot;, and &quot;Installing Applications&quot;.So the truth is that for most users Defender has got 99% of top performance and maybe 1% bottom performance. Of course, for some users this 1% can be annoying as [USER=78686]@SeriousHoax[/USER] already noticed.When we look into the results of the last Performance Test (April 2021) made by AV-Test, we can see even better scorings (Defender scored top result 6.0):[ATTACH=full]259298[/ATTACH]Defender and Eset have got the top performance also in MRG Effitas test (Q1 2021):[ATTACH=full]259299[/ATTACH]In this test, Microsoft Defender has got the top performance also for other activities (not measured by AV-Comparatives and AV-Test) like: Bootup time, Size on disk, AV update.Anyway, the AV performance can be different on different machines. Furthermore, the users usually have a personal view on which &quot;performance factor&quot; is most annoying.</blockquote>

[QUOTE="Andy Ful, post: 948581, member: 32260"] Saying so is somewhat misguiding. The case is more complicated. In fact, when taking into account also the benchmarks of AV-Test and MRG Effitas, we can see that Defender benchmarks are much better than for average AV. Let's look into the last Performance Test (April 2021) made by AV-Comparatives. There are only a few AVs (Eset, K7, Microsoft, Total Defense) that scored the maximum in the activities most important to average users: "Launching Applications", "Downloading Files", "Browsing Websites". These activities take over 99% of the time. It is true that Microsoft is the slowest AV (in this test) for such activities as "File copying", "Archiving / Unarchiving", and "Installing Applications". So the truth is that for most users Defender has got 99% of top performance and maybe 1% bottom performance. Of course, for some users this 1% can be annoying as [USER=78686]@SeriousHoax[/USER] already noticed. When we look into the results of the last Performance Test (April 2021) made by AV-Test, we can see even better scorings (Defender scored top result 6.0): [ATTACH type="full" alt="1624633240799.png"]259298[/ATTACH] Defender and Eset have got the top performance also in MRG Effitas test (Q1 2021): [ATTACH type="full" alt="1624633570769.png"]259299[/ATTACH] In this test, Microsoft Defender has got the top performance also for other activities (not measured by AV-Comparatives and AV-Test) like: Bootup time, Size on disk, AV update. Anyway, the AV performance can be different on different machines. Furthermore, the users usually have a personal view on which "performance factor" is most annoying. [/QUOTE]

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