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| author | Tels <nospam-abuse@bloodgate.com> | 2001-03-31 15:21:05 +0200 |
|---|---|---|
| committer | Jarkko Hietaniemi <jhi@iki.fi> | 2001-03-31 15:48:44 +0000 |
| commit | cd5c4fcec809b2856fa6108149fbf2c281764644 (patch) | |
| tree | 50a07eef656671faf2e1c16cec498b1555375165 /pod/perlop.pod | |
| parent | d39e935932816a4deccbeecc521d949f9074ab8e (diff) | |
| download | perl-cd5c4fcec809b2856fa6108149fbf2c281764644.tar.gz | |
Re: Math::Big* v1.21
Message-Id: <200103311125.GAA377738@www08.hway.net>
p4raw-id: //depot/perl@9489
Diffstat (limited to 'pod/perlop.pod')
| -rw-r--r-- | pod/perlop.pod | 25 |
1 files changed, 21 insertions, 4 deletions
diff --git a/pod/perlop.pod b/pod/perlop.pod index 8e4cddf97a..9cae3a2163 100644 --- a/pod/perlop.pod +++ b/pod/perlop.pod @@ -1902,7 +1902,7 @@ need yourself. The standard Math::BigInt and Math::BigFloat modules provide variable-precision arithmetic and overloaded operators, although -they're currently pretty slow. At the cost of some space and +they're currently pretty slow. At the cost of some space and considerable speed, they avoid the normal pitfalls associated with limited-precision representations. @@ -1912,8 +1912,25 @@ limited-precision representations. # prints +15241578780673678515622620750190521 -The non-standard modules SSLeay::BN and Math::Pari provide -equivalent functionality (and much more) with a substantial -performance savings. +There are several modules that let you calculate with (bound only by +memory and cpu-time) unlimited or fixed precision. There are also +some non-standard modules that provide faster implementations via +external C libraries. + +Here is a short, but incomplete summary: + + Math::Fraction big, unlimited fractions like 9973 / 12967 + Math::String treat string sequences like numbers + Math::FixedPrecision calculate with a fixed precision + Math::Currency for currency calculations + Bit::Vector manipulate bit vectors fast (uses C) + Math::BigIntFast Bit::Vector wrapper for big numbers + Math::Pari provides access to the Pari C library + Math::BigInteger uses an external C library + Math::Cephes uses external Cephes C library (no big numbers) + Math::Cephes::Fraction fractions via the Cephes library + Math::GMP another one using an external C library + +Choose wisely. =cut |