1.x: benchmark reduce and takeLast(1) (#4174)
1.x: benchmark reduce and takeLast(1) (#4174)

* 1.x: benchmark reduce and takeLast(1)

* add collect() benchmark

hzysoft/RxJava,davidmoten/RxJava,hzysoft/RxJava,weikipeng/RxJava,tilal6991/RxJava,weikipeng/RxJava,nurkiewicz/RxJava,davidmoten/RxJava,weikipeng/RxJava,nurkiewicz/RxJava,tilal6991/RxJava,hzysoft/RxJava,tilal6991/RxJava,nurkiewicz/RxJava,davidmoten/RxJava