Most of KClassImpl operations should be cached, but creating a lazy value for
each operation would significantly increase memory footprint of a KClassImpl
instance. Therefore we decide to store all lazy values under a single lazy
value named 'data' which is stored in KClassImpl. There's a minor overhead of
indirection on any operation now, however it'll allow us to substantially
increase reflection performance by caching everything we can
Alexander Udalov
b9067e6462