According to pprof the queue may grow up to hundreds of Kbs on simple examples. It should be instrumented.
Created attachment 157434 [details]
Attachment 157434 [details] did not pass style-queue:
Failed to run "['Tools/Scripts/check-webkit-style', '--diff-files', u'Source/WebCore/ChangeLog', u'Source/WebCor..." exit_code: 1
Source/WebCore/dom/Event.h:34: Code inside a namespace should not be indented. [whitespace/indent] 
Total errors found: 1 in 6 files
If any of these errors are false positives, please file a bug against check-webkit-style.
Comment on attachment 157434 [details]
Clearing flags on attachment: 157434
Committed r125185: <http://trac.webkit.org/changeset/125185>
All reviewed patches have been landed. Closing bug.