The existing Sandbox profiles refer to various unsupported versions of macOS. These conditionals are evaluated at runtime, so have a non-zero cost, and are always false for anything shipped in the last few years. Clean up these old entries!
Created attachment 294507 [details] Patch
Committed r208611: <http://trac.webkit.org/changeset/208611>
This change is wrong. I misread the Scheme conditional clause as if it was C++, instead I should have recognized that Scheme's conditional looks like this: (if (predicate ...) (stuff to do if true) (stuff to do if false)) I will fix this in Bug 165187.