erenkarayigit / taskell-2.0

taskell 2.0

I'm going to be taking a break from development of Taskell for a while. Trying to do it alongside my day job was proving a bit much. Feel free to continue to submit issues, but I won't be able to work on any of them immediately. Pull requests also welcome. Thanks for understanding 🙂

Taskell 2.0

A complete rewrite of taskell focussing on application architecture and performance.

I wrote the original version of taskell when I was first learning Haskell. As a result I made many bad decisions that would be hard to re-engineer in place.

I'm taking a data first approach: creating the relevant data structures and parsers, then moving onto IO, and finally getting the UI in place once all of that is benchmarked and tested.

Improvements

• More tests: many more tests than the original version. Taking a largely TDD approach.
• Benchmarking: most functionality is benchmarked
• Better data structure: the original data structure was just a three level sequence. This makes things like adding tags/contributors/related tasks difficult to do efficiently.
• Serialisation: using a Builder for much faster ByteString generation

Benchmarking

Setup

Install direnv and criterion-cmp:

brew install direnv
cabal install criterion-cmp

In the project directory:

direnv allow

Adds all scripts in .bin/ to your $PATH (in this working directory only).

Running

All benchmarks:

bench

A specific group:

bench-group <group-name>