A very efficient ByteString builder implementation based on the binary tree https://github.com/nikita-volkov/bytestring-tree-builder
|LTS Haskell 11.10:||0.2.7.1|
|Stackage Nightly 2018-05-27:||0.2.7.1|
|Latest on Hackage:||0.2.7.1|
According to the benchmarks this builder implementation beats all the alternatives. It is especially well-suited for generating strict bytestrings, beating the standard builder by at least the factor of 4.