This does not seem to be the public opinion in this topic. For example, FreeBSD's perl port contains the lines:

        @${ECHO} "      WITHOUT_PERL_MALLOC=yes   Use FreeBSD system m
+alloc"
        @${ECHO} "                                (uses less memory, b
+ut slower)
[download]

And the hint file in the perl distribution used to have the following lines:

4.*)   # In FreeBSD 4 and 5 the system malloc is performance-wise
       # VERY bad for Perl-- we are talking of differences of not
       # one, but TWO magnitudes.
[download]

This is not part of the default hint file anymore, but only because perl's malloc does not work with threaded builds, so Jarkko decided to always use the system's malloc.

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