License & RegistrationBandizip License Policy
How to register Bandizip
Bandizip Edition Comparison
Bandizip MSE (Microsoft Store Edition)
How to receive a receipt
How to unregister Bandizip
Exclusive features of Bandizip Paid EditionHow to use the Password Manager
How to use Repair Archive
How to use the Password Recovery
How to preview images in an archive with Bandizip
How to use Antimalware Scan on Archive
Features & Technical TermsHow to use Extract Here (Smart)
How to split a large file into smaller files with Bandizip
How to use Unicode filenames in ZIP format
ZIPX archive format
7z archive format
ZPAQ archive format
How to open RAR files
How to open ALZ and EGG files
How to use Fast Drag and Drop
How to use Multi-core Compression
How to use High-speed Archiving
How to modify an archive without decompression
How to open a file in an archive without extraction
How to edit a file and save it in an archive directly
How to set a password for an archive
How to encrypt filenames in archives
How to move files to Recycle Bin (Trash) when deleting
How to compress a file even when the file is used by another process
How to use Parallel Extraction
Expand folder tree automatically
How to prevent data corruption by safe backup
How to test an archive
How to copy Zone.Identifier information for malware protection
How to change the theme color for Bandizip
How to export and import Bandizip settings
How to uninstall Bandizip
Command Line Parameters
Bandizip Setup Command Line Parameters
Bandizip on Windows 10 on ARM
TroubleshootingHow to troubleshoot when I can’t register Bandizip
How to troubleshoot when I can’t access the email account that I used to buy Bandizip
How to troubleshoot when codepage auto-detection doesn’t work correctly
How to troubleshoot when Bandizip opens archive files automatically when I download them on the browser
How to troubleshoot when an icon for archives doesn’t appear properly in the File Explorer
How to troubleshoot when a right-click menu (context menu) for Bandizip doesn’t appear
How to troubleshoot when a right-click menu (context menu) for Bandizip isn’t displayed properly
How to troubleshoot when the compression or decompression speed is too slow
How to troubleshoot when Error 22 occurs and Mac Finder on Catalina can’t extract a ZIP archive
How to troubleshoot when Mac Finder can’t extract an encrypted ZIP file
How to use a non-alphabetic language character in a password
How to test multiple archives
How to troubleshoot “The parameter is incorrect.”
How to troubleshoot when Bandizip conflicts with Sticky Notes
How to troubleshoot when I can’t open an archive in a network mapped drive
How to troubleshoot when a split archive can’t be decompressed
How to troubleshoot when bdzsfx.x86.sfx is diagnosed as malware
How to run Bandizip on Linux using Wine
How to use Multi-core Compression
What is Multi-core?
A core is a processing unit in a CPU, and a CPU with two or more cores is called a multi-core CPU. Multi-core CPUs have become very common these days. Four or eight-core CPUs are widely used, and even CPUs for mobile devices are made as multi-core CPUs. Therefore, whether a software product supports multi-core CPUs is an essential factor in evaluating its performance.
Bandizip supports multi-core compression. Since data compression requires a lot of CPU work, using multi-core helps to improve the compression speed.
For example, Bandizip compresses your file(s) 6 times faster with 4 cores 8 threads CPU, and 13 times faster with 8 cores 16 threads CPU.
The pictures below show the comparison between Bandizip that supports multi-core and Mac Finder that only uses single-core.
Why is multi-core not used during decompression?
You may find that compression by Bandizip increases the CPU usage to the maximum, but decompression does not increase the usage that much.
This is due to a characteristic of data compression algorithms. When decompressing an archive, most algorithms should access the front data of the archive first. Unlike compression, therefore, decompression is difficult to be processed in parallel by a multi-core CPU. Even with a large number of cores, the processing speed hardly improves.
Thanks to the recent advancement of technology, however, some ways have been introduced to make full use of a multi-core CPU when decompressing an archive. Bandizip may perform faster decompression using every core in the CPU for the following archives:
Why is CPU usage not high during compression?
There may be a problem that compression doesn’t increase the usage either. Compression is processed by the following steps:
In general, a bottleneck occurs during the compression, resulting in high CPU usage. However, in some cases, such as using slow-speed media (external USB drive, network drive, etc.) a bottleneck occurs on storage I/O and therefore CPU usage is not high.