Sat, 14 Jul 2018 13:21:49 +0900 Yuya Nishihara phases: micro-optimize newheads() to not create context objects
Sat, 14 Jul 2018 13:19:18 +0900 Yuya Nishihara phases: remove excessive optimization from newheads() (issue5939)
Sun, 15 Jul 2018 15:48:18 +0530 Sushil khanchi rebase: remove unused variable "release" and an extra blank line
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