INTRODUCTION
-This is wimlib version 1.7.5-BETA (January 2015). wimlib is a C library for
+This is wimlib version 1.8.1 (May 2015). wimlib is a C library for
creating, modifying, extracting, and mounting files in the Windows Imaging
Format (WIM files). wimlib and its command-line frontend 'wimlib-imagex'
provide a free and cross-platform alternative to Microsoft's WIMGAPI, ImageX,
COMPRESSION RATIO
wimlib (and wimlib-imagex) can create XPRESS, LZX, or LZMS compressed WIM files.
-wimlib includes its own compression codecs and does not use the compression API
-available on some versions of Windows.
-
-I have gradually been improving the compression codecs in wimlib. For all three
-codecs, they now usually outperform and outcompress the equivalent Microsoft
-implementations. Although results will vary depending on the data being
-compressed, in the table below I present the results for a common use case:
-compressing an x86 Windows PE image. Each row displays the compression type,
-the size of the resulting WIM file in bytes, and how many seconds it took to
-create the file. When applicable, the results with the equivalent Microsoft
-implementation in WIMGAPI is included.
+wimlib's compression codecs usually outperform and outcompress their Microsoft
+equivalents. Although results will vary depending on the data being compressed,
+the table below shows results for a common use case: creating an x86 Windows PE
+image ("boot.wim"). Each row shows the compression type, the size of the
+resulting WIM file in bytes, and the time it took to create the file. When
+possible, the results with the Microsoft equivalent are included.
=============================================================================
- | Compression || wimlib (v1.7.5-BETA) | WIMGAPI (Windows 8.1) |
+ | Compression || wimlib (v1.8.0) | WIMGAPI (Windows 8.1) |
=============================================================================
| None [1] || 361,314,224 in 2.4s | 361,315,338 in 4.5s |
| XPRESS [2] || 138,218,750 in 3.0s | 140,457,436 in 6.0s |
The compression ratio provided by wimlib is also competitive with commonly used
archive formats. Below are file sizes that result when the Canterbury corpus is
-compressed with wimlib (v1.7.5), WIMGAPI (Windows 8.1), and some other
+compressed with wimlib (v1.8.0), WIMGAPI (Windows 8.1), and some other
formats/programs:
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