How to use parallel processing in graph_tool

I am working on a very large graph edges~4M. I need to use parallel
processing for finding the various properties, isolating subgraphs and
finding centrality measures etc.
Also it'd be fun if I could actually plot the graph without waiting forever.
Please Help
Shubham

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I am working on a very large graph edges~4M. I need to use parallel processing for finding the various properties, isolating subgraphs and finding centrality measures etc.

If you compile graph-tool with openmp enabled (--enable-openmp), many of
these functions will run in parallel.

Also it'd be fun if I could actually plot the graph without waiting forever.

Graph drawing is not done in parallel, but it is very unlikely the
output of a graph with 4 million edges will look anything different than
a huge blob, unless your graph has a very simple structure, like a tree
or some other planar topology.

Best,
Tiago