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| author | Pádraig Brady <P@draigBrady.com> | 2013-12-03 03:51:52 +0000 |
|---|---|---|
| committer | Pádraig Brady <P@draigBrady.com> | 2013-12-04 13:18:56 +0000 |
| commit | b53b0fd940382497e58a9e912f1262c2084fe534 (patch) | |
| tree | 7b5fde00794f059d22b685f05794b754a4aa513e /README-prereq | |
| parent | 2091f44993c4d0ad16cbe272c247bb452ae74216 (diff) | |
| download | coreutils-b53b0fd940382497e58a9e912f1262c2084fe534.tar.xz | |
md5sum, sha*sum: use libcrypto where available
libcrypto is generally available and has well optimized
crypto hash routines particular to various systems.
For example, testing sha1sum with openssl-1.0.0j
on an i3-2310M, gives a performance boost of about 40%:
$ time sha1sum.old --tag ~/test.iso
SHA1 (/home/padraig/test.iso) = 3c27f7ed01965fd2b89e22128fd62dc51a3bef30
real 0m4.692s
user 0m4.499s
sys 0m0.162s
$ time sha1sum.new --tag ~/test.iso
SHA1 (/home/padraig/test.iso) = 3c27f7ed01965fd2b89e22128fd62dc51a3bef30
real 0m2.685s
user 0m2.512s
sys 0m0.170s
* configure.ac: By default, enable use of libcrypto if available.
* src/local.mk: Link with libcrypto.
* NEWS: Mention the md5sum and sha*sum improvements.
Diffstat (limited to 'README-prereq')
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