Arvind Srinivasan wrote: > 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?
Negligible with a few exceptions. PHP is one of them, it becomes quite bulky when you --enable-zts. Yes, a module built for worker will work against prefork MPM, if the prefork MPM has been built against a threaded APR. Bill
