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ae7eaf15fc
Closes #84 # Changes - Implemented new algorithm for tracking loaded entities and chunks. - The client does not need to maintain a list of loaded chunks and entities anymore, as this information can be inferred using carefully maintained data from the previous tick. - Chunks are used as a spatial partition for entities. Entity visibility is now based on chunk visibility rather than the euclidean distance to clients. - The BVH is no longer strictly necessary, so it has been moved to the new `valence_spatial_index` crate. - The API has been generalized to support things other than entities. The crate does not have a dependency on the main `valence` crate. - Chunk, entity, and player list packets are now aggressively cached to increase performance. - Chunk packets now include some filler light data. This makes the vanilla client lag a lot less. - Entities and chunks must now be marked as deleted before they are removed. - Improved `ChunkPos` interface. - Added function to get the duration per tick. - Added `Index` and `IndexMut` impls to collection types. As a result of the above changes, performance under heavy load has increased significantly. With the rust-mc-bot test on my machine, I went from a max of ~1000 players to ~4000 players. |
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Performance Tests
Run the server
cargo r -r -p bench_players
In a separate terminal, start rust-mc-bot. This command should connect 1000 clients to the server.
# In the rust-mc-bot directory
cargo r -r -- 127.0.0.1:25565 1000
If the delta time is consistently >50ms, the server is running behind schedule.
Note:
Flamegraph
To start capturing a flamegraph, run the server like this:
# You can also try setting the `CARGO_PROFILE_RELEASE_DEBUG` environment variable to `true`.
cargo flamegraph -p bench_players
Run rust-mc-bot as above, and then stop the server after a few seconds. Flamegraph will generate a flamegraph.svg in the current directory. You can then open that file in your internet browser of choice.