No product attained the worst score of 25 slow-down points.
The solutions from Norman, Quick Heal and Threat Track already slow down a PC significantly with 12, 12.4 and 13.9 load points.
If the system is protected by the Windows built-in Security Essentials or Microsoft Defender, the load is 8.7 points. All other 14 products are above that threshold. The additional 6 products from McAfee, Bullguard, Trend Micro, Norton, Avira and F-Secure also achieve good rankings at 6.1 to 7.9 load points in their endurance test results. Following close behind are the security packages from Bitdefender and Qihoo 360 with 5.3 and 5.7 points respectively. As previously mentioned, the maximum perfect score was 5.0. The lowest influence and thus the best speed-performance rating was achieved by the product from Kaspersky with only 5.1 load points. All partial results of the tests were aggregated and at the end divided by the number of 7 test rounds. Thus for all 5 test sections, this resulted in a perfect score of 5 and a worst score of 25 load points. For 21 to 40 percent there were 2 points, for 41 to 60 percent drop in performance, 3 points, and so on up to 5 points. If an antivirus application slowed down a system between 0 and 20 percent, it received 1 load point.
A more in-depth explanation on the topic of reference systems can be found later in the "Test Configuration" section.įor all products in the tests, it was measured how long they required for various test sets, in order toįor all subsections, load points of 1 to 5 were assigned after each test, whereby a score of 1 represents good and a score of 5 poor.
The reference system without any protection software was used for later comparison of the measured performance ratings. In addition, a Windows system with the freeware Microsoft Security Essentials or Defender (for Windows 8/8.1) was put through all the tests as an additional comparative figure.
Rename the file in the “File name” field and click “Save.” You now have a PDF optimized for the Internet.Included in the test were products from Ahnlab, Avast, AVG (freeware and purchase product), Avira, Bitdefender, BullGuard, Comodo, ESET, F-Secure, G Data, Kaspersky, McAfee, Microworld, Norman, Norton, Panda, Qihoo 360, Quick Heal, Tencent, Threat Track and Trend Micro. This is a safeguard, so that you don’t inadvertently save over the original print-quality PDF.
Acrobat Pro displays the “Save Optimized As” dialog box. If the value in the Resolution field is higher than 72 (or 96 for HD displays), change this number to optimize the images for display on computers.Ĭlick “OK” to apply the settings. This is the resolution of the monochrome images in your PDF. Notice the field next to the “Downsample” drop-down. Setting this drop-down to a setting lower than “Medium” can also degrade your image quality.Įxamine the “Monochrome Images” portion of the “Image Settings” section (the third section) of the PDF Optimizer dialog box. You can also make the images smaller by adjusting the compress quality (the “Quality” drop-down). If the value in the Resolution field is higher than 72 (or 96 for HD displays), change this number to optimize the images for display on computers.
This is the resolution of the grayscale images in your PDF. Be careful though, setting this drop-down to a setting lower than “Medium” can greatly degrade your image quality.Įxamine the “Grayscale Images” portion of the “Image Settings” section (the second section) of the PDF Optimizer dialog box. Computer monitors can display only 72 DPI or 96 DPI on High Definition (HD) monitors. This is the resolution of the color images in your PDF, measured in dots per inch (DPI).
Click “OK” to close the dialog box.Įxamine the “Color Images” portion of the “Image Settings” section (the first section) of the PDF Optimizer dialog box. For example, notice that “Images” takes up the largest percentage of the file, sometimes up to 80 percent or more of the overall PDF size. It displays the overall size (in bytes) of the elements making up the PDF and the percentage of the file size each type of element uses. Click the “Audit space usage” button to open the Audit Space Usage dialog box.