DumpRenderTree disables App Nap since bug 108400, and I just made WebKit2 secondary processes not app nap in bug 144155. But WebKitTestRunner itself can still be suppressed, as far as I can tell.
Created attachment 251808 [details] proposed patch This changes process role from TASK_BACKGROUND_APPLICATION to TASK_UNSPECIFIED. I don't know all the ramifications, but at least the patch is not a no-op, and it makes WKTR more like DRT.
Comment on attachment 251808 [details] proposed patch View in context: https://bugs.webkit.org/attachment.cgi?id=251808&action=review This looks sane to me. > Tools/WebKitTestRunner/mac/main.mm:45 > + static id assertion = [[[NSProcessInfo processInfo] beginActivityWithOptions:options reason:@"DumpRenderTree should not be subject to process suppression"] retain]; DumpRenderTree => WebKitTestRunner
Committed r183488.