Optimize spawn_unlinked.#8317

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bors merged 2 commits intorust-lang:masterfrom

bblum:fast-spawn-unlinked

Aug 6, 2013

Commits on Aug 5, 2013

(cleanup) Uncomment an assertion that now holds.
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Lazily initialize 'leaf node' taskgroups for unlinked spawns, for an apparent 11% speedup.
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