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Parrot 6.6.0 "Parrothead" released!

Bruce Gray
July 16, 2014 08:55
Parrot 6.6.0 "Parrothead" released!
Message ID:
    As a dreamer of dreams and a travelin' man,
    I have chalked up many a mile.
    Read dozens of books about heroes and crooks,
    And I've learned much from both of their styles.
        -- Heard playing in Margaritaville bar,
           in Orlando after YAPC::NA::2014.

On behalf of the Parrot team, I'm proud to announce Parrot 6.6.0, also known
as "Parrothead".  Parrot ( is a virtual machine aimed
at running all dynamic languages.

Parrot 6.6.0 is available on Parrot's FTP site
(, or by following the
download instructions at  For those who would like
to develop on Parrot, or help develop Parrot itself, we recommend using Git to
retrieve the source code to get the latest and best Parrot code.

Parrot 6.6.0 News:
    - Core
        + Optimized method call overhead at compile-time in pmc2c directly
          to avoid run-time overhead. Less temp. PMC's, less branches and
          avoiding at least 2 costly C functions per method call.
        + New arity warning:
            "wrong number of arguments: %d passed, %d expected" [GH #1080]
    - Build
        + Workaround libffi-3.1 upstream bug in ffi.h [GH #1081]
        + Expand pkg-config make macros in auto::libffi [GH #1082]
    - Tests
        + Fix t/pmc/filehandle.t on cygwin with newer Cwd >= 3.40 [GH #1077]
    - Community
        + Our GSoC student passed the project midterm, having made great progress.
          Congratulations to Chirag Agrawal!
        + More parrot-bench numbers at,
          now using gnuplot for all releases from 1.8.0 - 6.6.0, amd64 + -m32

The SHA256 message digests for the downloadable tarballs are:
6d21d3b733d980ab7cb8ee699c59e2b782d8a9c8c0e2cb06d929767e61024ace parrot-6.6.0.tar.gz
08e9e02db952828f6ab71755be47f99ebc90894378f04d8e4d7f3bc623f79ff5 parrot-6.6.0.tar.bz2

Many thanks to all our contributors for making this possible, and our sponsors
for supporting this project.  Our next scheduled release is at 19 Aug 2014.

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