EthereumJ uses a custom implementation of BN128 logic. Since it was introduced an year ago different parties have made a good progress in both optimization and implementation of libraries that provides same functionality.
To Do
EthereumJ implementation needs to be benchmarked and compared with other java implementation, like https://github.com/apache/incubator-milagro-crypto (maybe this is the only one thing worth to be checked).
Preamble
EthereumJ uses a custom implementation of BN128 logic. Since it was introduced an year ago different parties have made a good progress in both optimization and implementation of libraries that provides same functionality.
To Do
EthereumJ implementation needs to be benchmarked and compared with other java implementation, like https://github.com/apache/incubator-milagro-crypto (maybe this is the only one thing worth to be checked).
Benchmarks done by other clients: