I can't confirm your observation, i.e. my 64-bit HiRes.so (for example) is just 35k.

Maybe you've somehow managed to statically link in libc (which is roughly 2 MB)?  What does ldd say?  Mine says: 

$ ldd /usr/local/lib/perl5/5.12.2/x86_64-linux-thread-multi/auto/Time/
+HiRes/HiRes.so
    linux-vdso.so.1 =>  (0x00007fff399fe000)
    librt.so.1 => /lib/librt.so.1 (0x00007f2e314fe000)
    libc.so.6 => /lib/libc.so.6 (0x00007f2e3119c000)
    libpthread.so.0 => /lib/libpthread.so.0 (0x00007f2e30f7f000)
    /lib64/ld-linux-x86-64.so.2 (0x00007f2e31911000)

[download]

(the entry libc.so.6 => ... would be missing if linked statically)

In reply to Re: large .so sizes under x86_64 by Eliya
in thread large .so sizes under x86_64 by perl5ever

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