Call directly the low-level subtree_elements function instead of
authorKim Nguyễn <kn@lri.fr>
Tue, 24 Apr 2012 13:50:38 +0000 (15:50 +0200)
committerKim Nguyễn <kn@lri.fr>
Tue, 24 Apr 2012 13:50:38 +0000 (15:50 +0200)
re-implementing it in ocaml.
Fixes bug: a3fdf1a5  Performance regression


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