GitLab

* compact

* prealloc memory for hashtable

* Fix

* upd

* Reduce memory

* upd
Co-authored-by: Ubuntu <ubuntu@ip-172-31-51-214.ec2.internal>

* add num nodes in ctors

* fix

* lint

* addresses comments

* replace with constexpr

* remove function with rvalue reference

* address comments

* [WIP] PinSAGE operators

* moved the edge remapping mess into C

* some docstrings

* lint

* lint x2

* lint x3

* skip gpu test on topk

* extend pinsage to any metapath

* lint x4

* addresses #1265

* add always_preserve (fixes #1266) and fix a silly bug

* disable gpu test on compaction

* lint

* fix a horrible bug and add more tests

* lint

* addresses comments

* lint

* bugfix

* addresses comments
Co-authored-by: Minjie Wang <minjie.wang@nyu.edu>