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| author | Jim Meyering <meyering@redhat.com> | 2011-12-20 14:39:57 +0100 |
|---|---|---|
| committer | Jim Meyering <meyering@redhat.com> | 2011-12-20 14:39:57 +0100 |
| commit | ed71262bc258311690e7761154f8413465d9c78e (patch) | |
| tree | add23c713b03ee39aa6371ddd27bda2fcaf11fb7 /doc | |
| parent | f797c04415d348ae15a0c0aa8a19cfe8d22569bd (diff) | |
| download | coreutils-ed71262bc258311690e7761154f8413465d9c78e.tar.xz | |
doc: improve factor example
* doc/coreutils.texi (factor invocation): Adjust example to use $(...)
consistently, not a mix of `...` and $(...). Separate the computation
of the product and the actual factorization, so the timing of the
latter doesn't include the cost of the former.
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/coreutils.texi | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/doc/coreutils.texi b/doc/coreutils.texi index c26a53d5d..c229f987a 100644 --- a/doc/coreutils.texi +++ b/doc/coreutils.texi @@ -15964,8 +15964,10 @@ Factoring the product of the eighth and ninth Mersenne primes takes about 30 milliseconds of CPU time on a 2.2 GHz Athlon. @example -M8=`echo 2^31-1|bc` ; M9=`echo 2^61-1|bc` -/usr/bin/time -f '%U' factor $(echo "$M8 * $M9" | bc) +M8=$(echo 2^31-1|bc) +M9=$(echo 2^61-1|bc) +n=$(echo "$M8 * $M9" | bc) +/usr/bin/time -f %U factor $n 4951760154835678088235319297: 2147483647 2305843009213693951 0.03 @end example |