Date: Thu, 22 Mar 2001 11:59:40 -0500 (EST) From: Trevor Johnson <trevor@jpj.net> To: <ports@FreeBSD.ORG> Subject: Re: new message digest support in pkgsrc (fwd) Message-ID: <20010322113401.N27806-100000@blues.jpj.net> In-Reply-To: <20010309162527.Q7303-100000@blues.jpj.net>
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> From: Alistair Crooks <agc@pkgsrc.org>
> > There is no discernable performance decrease in using sha1 checksums
> > over md5 ones, and most people advocate the use of sha1 or rmd160 over
> > md5.
Here's an example. Calculating both 160-bit checksums for the biggest
chunk of the XFree86 sources takes less than four seconds on a 412 MHz
Pentium II.
$ ls -l X402src-1.tgz
-rw-r--r-- 1 root wheel 23880758 Dec 18 17:09 X402src-1.tgz
$ cat X402src-1.tgz>/dev/null; \
> /usr/bin/time -l md5 X402src-1.tgz; \
> cat X402src-1.tgz>/dev/null; \
> /usr/bin/time -l openssl dgst -rmd160 X402src-1.tgz; \
> cat X402src-1.tgz>/dev/null; \
> /usr/bin/time -l openssl dgst -sha1 X402src-1.tgz
MD5 (X402src-1.tgz) = d314c311aa4a29d74695b0e39b6d80c4
1.38 real 1.05 user 0.32 sys
68 maximum resident set size
44 average shared memory size
12 average unshared data size
128 average unshared stack size
18 page reclaims
0 page faults
0 swaps
0 block input operations
0 block output operations
0 messages sent
0 messages received
0 signals received
0 voluntary context switches
31 involuntary context switches
RIPEMD160(X402src-1.tgz)= a7a0cc3e5d30a54bd88a630164f36d6c84d94562
1.94 real 1.67 user 0.24 sys
1260 maximum resident set size
237 average shared memory size
88 average unshared data size
129 average unshared stack size
118 page reclaims
0 page faults
0 swaps
0 block input operations
0 block output operations
0 messages sent
0 messages received
0 signals received
0 voluntary context switches
28 involuntary context switches
SHA1(X402src-1.tgz)= ed313943fc5337dd30f8812e0b963e6431515ba6
1.83 real 1.64 user 0.18 sys
1260 maximum resident set size
236 average shared memory size
87 average unshared data size
128 average unshared stack size
119 page reclaims
0 page faults
0 swaps
0 block input operations
0 block output operations
0 messages sent
0 messages received
0 signals received
0 voluntary context switches
24 involuntary context switches
--
Trevor Johnson
http://jpj.net/~trevor/gpgkey.txt
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