[lld] r250808 - [ELF2] - Lazy relocation support for x86_64.

[Rui Ueyama via llvm-commits]

On Tue, Oct 20, 2015 at 1:17 PM, George Rimar <grimar at accesssoftek.com>
wrote:

> >That would be awesome. Please be careful about the detail conditions
> because the symbol resolution performance is affected by various conditions
> such as library search order, symbol name, etc. Probably the easiest way to
> evaluate that is to use a real world program, such as Clang, as a benchmark.
>
> What about that synthetic case: 1 DSO with N generated functions and 1
> caller file with N * 2 calls to this different N functions.
> Comparing time of first N calls and second N calls we can know the time of
> N dynamic resolvings and time of clear N calls since PLT table will be
> filled with actual addresses after first N calls.


That test may be good to measure the bare performance, but I guess that's
synthetic. One of the big selling points of lazy binding is that it would
reduce the number of symbol resolution because not all function are
actually used.
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