On Wed, Sep 5, 2012 at 10:55 PM, Martin Sebor <mse...@gmail.com> wrote:
> I suspect the difference is due to the overhead of the repeated > initialization and destruction of the per-object mutex in the > test. The test repeatedly creates (and discards) named locale > objects. > > The per-class mutex is initialized just once in the process, no > matter how many facet objects (how many distinct named locales) > the test creates. But the per-object mutex must be created (and > destroyed) for each named locale. Agreed. But: if the choice is between an implementation which [1] breaks ABI and [2] performs 20% worse -- even in contrived test cases -- than another implementation [2] which doesn't break ABI, and performs better than the first one, why would we even consider the first one? --Stefan -- Stefan Teleman KDE e.V. stefan.tele...@gmail.com
