Remove pessimization of print() performance in 4.1 branch. #14135
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As pointed out in Ole Begeman's blog: https://oleb.net/blog/2016/09/playground-print-hook/ The playground print hook is being initialized a a non-null noop hook, which causes the fast paths in the print functions to be unused, and forcing the creation of a tee stream for things that have nothing to do with playgrounds. It is sad that no one noticed this...
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@swift-ci test |
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Remove pessimization of print() performance in 4.1 branch by using 'nil' instead of an empty closure.
rdar://problem/36839411