https://github.com/facebook/folly/pull/2122
https://github.com/facebook/folly/pull/2117
https://github.com/facebook/folly/pull/2115
https://github.com/facebook/folly/pull/2109
https://github.com/facebook/folly/pull/2105
https://github.com/facebook/folly/pull/2104
https://github.com/facebook/folly/pull/2098
https://github.com/facebook/folly/pull/2096
https://github.com/facebook/folly/pull/2092
https://github.com/facebook/folly/pull/2086
