NAME
Faster::Maths - make mathematically-intense programs faster
SYNOPSIS
use Faster::Maths;
# and that's it :)
DESCRIPTION
This module installs an optimizer into the perl compiler that looks for
sequences of maths operations that it can make faster.
When this module is lexically in scope, mathematical expressions
composed of the four basic operators (+, -, *, /) operating on lexical
variables and constants will be compiled into a form that is more
efficient at runtime.
BUGS
* Does not currently respect operator overloading. All values will
get converted into NVs individually, and composed using regular NV
maths.
We should recognise the presence of overloading magic on variables
and fall back to slower-but-correct operation in that case; also
potentially ignore any OP_CONSTs with magical values.
https://rt.cpan.org/Ticket/Display.html?id=136453
* Does not currently retain full integer precision on integer values
larger than platform float (NV) size. All values will get converted
to NVs immediately, thus losing the lower bits of precision if the
value is too large.
https://rt.cpan.org/Ticket/Display.html?id=136454
TODO
* Recognise more potential arguments - padrange and package variables
at least.
* Recognise more operators - %, unary - and sqrt, possibly other
unary operators like sin.
* Store IV/UV constants as values directly in the UNOP_AUX structure
avoiding the need for SV lookup on them.
* Back-compatibility to perls older than 5.22.0 by providing an
UNOP_AUX implementation.
AUTHOR
Paul Evans