X-Git-Url: https://wimlib.net/git/?a=blobdiff_plain;f=README;h=3cb9e900fb194026c87e17ab5b5925f0515d2d74;hb=b6034a5dd44709341c46d553b1c0294ec91f13e4;hp=a01d5116fb14d085a5811ce1d24a42c704def77d;hpb=345d31902b50d440b918d2ec3a16c0f4bfff08ad;p=wimlib diff --git a/README b/README index a01d5116..3cb9e900 100644 --- a/README +++ b/README @@ -61,15 +61,14 @@ commands and their syntax. For additional documentation: COMPRESSION RATIO -wimlib (and wimlib-imagex) can create XPRESS, LZX, or LZMS compressed WIM archives. -The following tables compare the compression ratio and performance for creating -a compressed x86_64 Windows PE image. Note: these timings were done on Windows -so that the times would be fully comparable; however, wimlib may have even -better performance on other operating systems such as Linux. Timings were done -with 2 CPUs available, both of which automatically are used by wimlib for both -XPRESS and LZX, and also by imagex.exe but apparently only for LZX. Results for -LZMS compression are excluded because the creation of LZMS compressed WIM -archives is not yet recommended. +wimlib (and wimlib-imagex) can create XPRESS, LZX, or LZMS compressed WIM +archives. The following tables compare the compression ratio and performance +for creating a compressed x86_64 Windows PE image with XPRESS and LZX. Note: +these timings were done on Windows so that the times would be fully comparable; +however, wimlib may have even better performance on other operating systems such +as Linux. Timings were done with 2 CPUs available, both of which automatically +are used by wimlib for both XPRESS and LZX, and also by imagex.exe but +apparently only for LZX. Table 1. WIM size @@ -89,7 +88,7 @@ The above LZX data are using explicitly specified maximum compression faster LZX compressor is used; it will produce results in between those given for XPRESS and LZX above. -Note: if the absolute maximum (but still compatible; i.e. not changing the +Note: if the absolute maximum but still compatible (i.e. not changing the compression chunk size) LZX compression ratio is desired, `wimlib-imagex optimize WIMFILE --recompress --compress-slow' on one of the above LZX-compressed WIMs produces a WIM of 187,089,943 bytes in about 400 seconds. @@ -276,9 +275,9 @@ suffix array construction code from divsufsort (https://code.google.com/p/libdivsufsort/) and algorithms from 7-Zip as well as several published papers. -lz77.c contains a hash-table-based LZ77 matchfinder that is based on code from -zlib but has been rewritten. This code is applicable to XPRESS, LZX, and LZMS, -all of which are partly based on LZ77 compression. +lz_hash.c contains a hash-table-based LZ77 matchfinder that is based on code +from zlib but has been rewritten. This code is applicable to XPRESS, LZX, and +LZMS, all of which are partly based on LZ77 compression. A limited number of other free programs can handle some parts of the WIM file format: