> On Tue, 2006-02-14 at 22:40 +0100, Florian Weimer wrote:
>> > TLS is entirely a legacy application backwards compatibility hack
>> > designed to support badly designed C applications.
>> 
>> TLS helps a lot on a certain register-starved architecture because you
>> don't need to keep a pointer to the thread data structure around in
>> case you don't need it (but called functions might). 
>
> What's wrong with placing it on the stack? 

Do you suggest to add an implicit argument to all function calls?
Unless you can optimize it away if it's not needed, the TLS approach
should still be faster for typical code.