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.

In reply to Re^5: 5:10: Why is this slower than 5.8.8? by eserte
in thread 5:10: Why is this slower than 5.8.8? by jk2addict

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