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[PATCH] Micro-optimization to avoid creating temporary path


Now that path::operator/=(basic_string_view<value_type>) works directly
from the string argument, instead of constructing a temporary path from
the string, it's potentially more efficient to do 'path(x) /= s' instead
of 'x / s'. This changes the only relevant place in the library.

	* src/filesystem/std-dir.cc (filesystem::_Dir::advance): Append
	string to lvalue to avoid creating temporary path.

Tested x86_64-linux, committed to trunk.

Attachment: patch.txt
Description: Text document


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