Changelog:
==========
- Improved performance of calling :py:meth:~yarl.URL.build
- Improved performance of all :class:~yarl.URL methods that create
new :class:~yarl.URL objects
- Improved performance of :class:~yarl.URL methods that modify the network
location
Signed-off-by: Wang Mingyu <wangmy@fujitsu.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>
