XCHG is slow ?

Florian Weimer fw at deneb.enyo.de
Thu Jul 5 13:33:15 PDT 2012

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* Rémi Forax:

> In fact, xchg is really slow in my laptop (Nehalem), slower than at
> least 5/6 instructions like move/xor/and.

Is this based on instruction-level profiling?

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