B::Bytecode - Perl compiler's bytecode backend |
B::Bytecode - Perl compiler's bytecode backend
perl -MO=Bytecode[,OPTIONS] foo.pl
This compiler backend takes Perl source and generates a platform-independent bytecode encapsulating code to load the internal structures perl uses to run your program. When the generated bytecode is loaded in, your program is ready to run, reducing the time which perl would have taken to load and parse your program into its internal semi-compiled form. That means that compiling with this backend will not help improve the runtime execution speed of your program but may improve the start-up time. Depending on the environment in which your program runs this may or may not be a help.
The resulting bytecode can be run with a special byteperl executable
or (for non-main programs) be loaded via the byteload_fh
function
in the B module.
If there are any non-option arguments, they are taken to be names of objects to be saved (probably doesn't work properly yet). Without extra arguments, it saves the main program.
perl -D
).
Stores package in the output.
=back
perl -MO=Bytecode,-O6,-ofoo.plc,-umain foo.pl
perl -MO=Bytecode,-S,-umain foo.pl > foo.S assemble foo.S > foo.plc
Note that assemble
lives in the B
subdirectory of your perl
library directory. The utility called perlcc may also be used to
help make use of this compiler.
perl -MO=Bytecode,-uFoo,-oFoo.pmc Foo.pm
Output is still huge and there are still occasional crashes during either compilation or ByteLoading. Current status: experimental.
Malcolm Beattie, mbeattie@sable.ox.ac.uk
Benjamin Stuhl, sho_pi@hotmail.com
B::Bytecode - Perl compiler's bytecode backend |