- Use parallel_for to iterate over all the stored chunks
- Only push a chunk to a queue if it is not already present, using chunk state bitfield (solves
memory leak, continously adding new elements to a queue)
- Properly delete an element from chunks concurrent_hash_map using accessor, then free the memory
(solves memory leak: not being able to delete old elements and always adding new ones)
Breaks:
- Rendering (will be properly refactored in a future commit)
- Block picking (will be refactored in a future commit)
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