In addition to the WinRAR and Winzip that people used to use, there are still a lot of free file compression software available. What do you choose to choose for compression software? Is compression ratio really important with compression software? Only from the compression percentage data of some software evaluation can determine the pros and cons of a software, and thus decide to choose a certain software? In fact, for ordinary people, the use of compression software is not likely to have such a large amount of data can be "pressure", in the face of faster and faster CPU, the compression rate has become a "floating cloud". This article takes the well-received three popular compression softwares such as good pressure, 360 compression, and WinRAR as examples to illustrate the other major indicators of compression software in addition to compression ratio. 1. Security of file compression My own things are placed in the network disk and I am worried about being unsafe. What should I do? Encrypted compression! Whether it can be encrypted during compression is a practical indicator for measuring compression software. Compression software must first encrypt the contents of the file, 360 compression, good pressure, WinRAR provide the function of adding password compression. In addition, if the file name information in the compressed package can be encrypted so that the file name cannot be displayed even after being opened, it is more secure. Good pressure only supports 7Z format file name encryption, 360 compression does not support ZIP file name encryption (Figure 1), and WinRAR 5 not only supports RAR, RAR5, ZIP format encryption compression, but also supports RAR two format file names. encryption. Tip: Several methods for adding passwords are created by right-clicking on the compression menu and adding them with the corresponding password-add command. The compressed package downloaded online is not safe, what should I do? After unpacking, look for anti-virus software? That might be too late! It is more convenient if the compression software has a security detection function that automatically detects and even predicts the security of the compressed package. Therefore, the security detection of compressed packages has become another indicator for measuring compression software. 360 compression provides the option of 360 Trojan Scan when opening a compressed file, and you can set the Trojan to scan when the file size is large (Figure 2). After opening a compressed package with 360 compression, it will automatically perform cloud Trojan detection on the files in the compressed package to ensure safe use. After the cloud Trojan detection, 360 compression will safely rate different types of files in the compressed package, effectively identify Trojans, scripts, common files, risk files, and there will be corresponding picture prompts in the upper right corner of the interface. It should be noted that double-clicking the file on the file with the security level for the Trojan will pop up a block-and-click dialog box, which effectively prevents the double-clicking of the Trojan and makes it safer. For Trojans, risk level files will have pop-ups for warning. Good pressure in the security aspect provides more choices, you can set the choice & ldquo; powerful dual-core cloud killing & rdquo;, & ldquo;QQ housekeeper cloud killing & rdquo;, & ldquo; 360 cloud killing & rdquo; three cloud killing engine module (Figure 3). The WinRAR software itself does not have its own security detection module, but there is an option to select an external virus scanning software (Figure 4). 2. Convenience of compression management Compress data belonging to different people into different files at once, or extract compressed packages belonging to different people into different people's folders. Whether batch files can generate different types of compressed packages according to different wishes during compression, and whether batch compressed packages can generate different result file storage structures according to the user's wishes when decompressing. These are again a practical indicator of compression software. 360 compression and good pressure can compress each file into a separate compressed package, for example, one-time compression of different data for different customers can be achieved. The three softwares can extract the batches of compressed packages into their own folders (Figure 5). The advantage of this is that you can avoid the coverage of the same name. For example, in the compression package of several products, there is a "description.PDF” file. If all files are unpacked in this directory, the description of the previous product will be overwritten by the latter product in the file named “PDF”. Therefore, it is necessary to extract the data of each product into a separate folder for storage. In addition, WinRAR has more detailed settings for defining different types of file compression and decompression filtering, and can also customize more complex automatic installation files. For the second time, 360 compression has the least choice in this regard. 3. Intelligent and efficient compression process The main purpose of compression is to reduce the file size and reduce the number of files. But compression also requires efficiency, the sooner the better. For data with low compression ratio in the file, how to bypass the compression to achieve efficient packaging? Different from ordinary TXT documents or other common document formats, some files are already in a compressed format (such as some compressed video). If you use compression software to compress, it takes a lot of time, but the final compressed file is different from the source file size. Not big. Therefore, we need to find efficient compression methods. In 360 compression, there is an option to store files with low compression ratio directly. If you are processing a compressed file of some compressed files, select this option to greatly improve compression efficiency and save compression. It takes time. Although all three compression software have the option to "storage" compression and several other compression methods, these require artificial selection and are not intelligent enough. In contrast, 360 compression does the best. 4. The versatility of the file format uses compression software to generate compressed files. We cannot ignore the versatility of the compression format. If the generated compressed file format is not very convenient to use, such a tool is certainly not the most popular. The preferred format currently should be ZIP, not the popular RAR format of previous years. The reason is that due to the non-openness of the RAR format, the professional WinRAR is not completely free, which makes the circulation of this format limited. For example, although a good pressure can read such a format file, it cannot generate a compressed package of this format. However, if we choose ZIP as the target, whether it is decompressing or compressing files, it will be widely supported. In addition, it is a good idea to support the generation of self-extracting EXE files. In this way, even if the other party does not install any decompression software, we can also use our files. This feature is supported by all three software. Tip: From this point of view, the three softwares have their own strengths. If your system configuration is not very low, and some compression and decompression functions are irreplaceable, then it is feasible to choose to install two or three models. But be careful to set the fold-right menu, otherwise the right-click menu will be very bloated. 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