8224624: Inefficiencies in CodeStrings::add_comment cause timeouts
Summary: Changing CodeStrings to a doubly-linked-list and searching for the comment with the right offset in reverse.
Reviewed-by: kvn
^build/
^dist/
^.idea/
nbproject/private/
^webrev
^.src-rev$
^.jib/
(^|/)\.DS_Store
(^|/)\.metadata/
(^|/)\.recommenders/
test/nashorn/script/external
test/nashorn/lib
NashornProfile.txt
(^|/)JTreport/
(^|/)JTwork/
(^|/)\.git/
^src/utils/hsdis/build/