run-webkit-tests --lint-test-files crawls the whole LayoutTests subtree
Created attachment 123391 [details] Patch
That's why it was so slow!
Comment on attachment 123391 [details] Patch Yup, I just noticed this as well :( See also bug 76749, which we might want to land instead of this.
That said, given that the second time you're collecting tests the filesystem is largely in cache, I wonder how much slower that is now? I.e., what is the total time for collecting twice or once?
Committed r105551: <http://trac.webkit.org/changeset/105551>
Can we add a test to prevent this from regressing (again?)? Might be a bit tricky.