Re: Small ld.elf_so speed up

[David Holland <dholland-tech%netbsd.org@localhost>]

On Thu, Apr 01, 2010 at 11:25:13PM +0200, Joerg Sonnenberger wrote:
 > The function pointer array approach works and is the best way to handle
 > modules, e.g. when you have to deal with function pointers anyway.
 > Otherwise it is generally an inferior calling convention.

To be fair, this depends on the architecture. The PIC models used for
ELF on most non-x86 architectures use function pointers and on some of
those an i386-like PLT approach would be ruinously expensive.

Meanwhile, you've ignored the fact that his library works via a
jumptable instead of binding by name; of course it's faster if you
have 10,000 functions called once each and it has nothing to do with
branch prediction.

-- 
David A. Holland
dholland%netbsd.org@localhost