I am observing a significant slow down when running the Weld integration testsuite. I tracked this down to this commit:

https://github.com/wildfly/wildfly/commit/13f09525717a089f8a524d086fd865798410f368

Here are the observed execution times of the Weld integration testsuite:
Before: Total time: 4:30.357s
After: Total time: 11:05.547s

I also tried running the WildFly's integration testsuite (testsuite/integration/basic) with and without the 13f09525717a089f8a524d086fd865798410f368 commit:

Before: Total time: 13:04.412s
After: Total time: 21:33.089s

Note that the difference is not observed when using the arquillian servlet protocol