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 - Caching of calls to `load_consensus_plugin()`, using [`@lru_cache`](https://docs.python.org/3/library/functools.html#functools.lru_cache). This speeds up the instantiation of `Bigchain` objects and greatly improves overall performance. [Pull Request #271](https://github.com/bigchaindb/bigchaindb/pull/271)
 - New `Dockerfile-dev` Docker file to make it easier for developers to _develop_ BigchainDB with Docker. One can run all unit tests with Docker again. [Pull Request #313](https://github.com/bigchaindb/bigchaindb/pull/313)
 - Transactions in invalid blocks are copied to the backlog: [Pull Request #221](https://github.com/bigchaindb/bigchaindb/pull/221).
+- Queries to the bigchain table now ignore invalid blocks: [Pull Request #324](https://github.com/bigchaindb/bigchaindb/issues/324)
+- Use secondary index on get_transaction: [Pull Request #324](https://github.com/bigchaindb/bigchaindb/issues/324)
 - New `bigchaindb` command to set the number of RethinkDB shards (in both tables): [Pull Request #258](https://github.com/bigchaindb/bigchaindb/pull/258)
 - Better handling of an outdated `setuptools`: [Pull Request #279](https://github.com/bigchaindb/bigchaindb/pull/279)