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Movable Tree CRDTs


This repo implements two algorithms for Movable Tree CRDTs by Rust.

  1. A highly-available move operation for replicated trees by M. Kleppmann, et al.
  2. CRDT: Mutable Tree Hierarchy by Evan Wallace
    • This rust implementation is translated from the original JavaScript source code in the blog website.

Correctness

A fuzzing test is built for making sure the correctness of the two implementations. Especially the consistency after synchronization.

Benchmark

Kleppmann et al. Evan
create 10000 nodes 1.4 ms 2.0 ms
1000 nodes move 10000 times[1] 9.9 ms 2795.6 ms
realtime move 10000 times[2] 16.1 ms 5691.5 ms
  • [1]: only benchmark the move operation
  • [2]: two peers take turns to perform a move operation and then synchronize immediately

The current Benchmark is only used as a reference, which does not represent the performance of the real-world, because it may lack the necessary optimization.

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