prefork and APR_HAS_THREADS

[Arvind Srinivasan]

Some popular Unix distros package two httpd binaries - one built with the 
prefork MPM and the other built with the worker MPM - but only one set of 
libraries and modules. I assume the libraries and modules are the ones compiled 
for the worker mpm.

Is the performance impact of the APR_HAS_THREADS code blocks in these 
libraries/modules small/neglible as opposed to if they had been built for the 
prefork MPM?

Are there any other implications of using libraries/modules built with 
APR_HAS_THREADS with the prefork MPM?

Thanks,
Arvind