PopularContents: Make a single copy of the graph per thread
Copying it 1k or 10k for each thread is wasteful, even though they are lightweight copies.
This brings the runtime down from 133 to ~100 hours.
Staging instance, all changes can be removed at any time
Copying it 1k or 10k for each thread is wasteful, even though they are lightweight copies.
This brings the runtime down from 133 to ~100 hours.