GitLab

* improve performance of sample_neighbors

* some more improve

* test script

* benchmarks

* multi process

* update more tests

* WIP

* adding two API for state saving

* add create from state

* upd test

* missing file

* wip: pickle/unpickle

* more c apis

* find the problem of empty data array

* add null array; pickling speed is bad

* still bad perf

* still bad perf

* wip

* fix the pickle speed test; now everything looks good

* minor fix

* bugfix

* some lint fix

* address comments

* more fix

* fix lint

* add utest for random.choice

* add utest for dgl.rand_graph

* fix cpp utests

* try fix ci

* fix bug in TF backend

* upd choice docstring

* address comments

* upd

* try fix compile

* add comment

* unit graph that prefers coo queries

* auto detect coo preference

* forgot some functions

* disable lint on detect_prefer_coo

* reorg

* change comment

* lint

* fix

* move array_utils.h to src

* compact graph impl

* fix redundant copying in idhashmap

* docstring

* moving preference detection to C

* lint

* fix unit test & address comments

* hypersparse autorestrict

* docstring & fix

* revert copyto and asnumbits

* fix stupid bug

* lint

* leave a TODO for sorted COO

* fixing same node type mapping to different id in different graphs

* addresses comments

* made induced nodes a feautre column

* lint?