Haskell Weekly

Low latency, large working set, and GHC’s garbage collector: pick two of three

We discovered in particular that [GHC’s GC’s] pause times relate linearly to the size of the working set.

GHCVM: A JVM backend for GHC

Compile Haskell to the JVM, with the primary goal of seamless compatibility with GHC 7.10.3’s Haskell.

Announcing Megaparsec 5

The most important feature in this release is well-typed and customizable error messages.

On Ad-hoc Datatypes

Adding quick datatypes — without all these instances and auxiliary functions — often makes code easier to read.

Are unused import warnings harmful?

While removing unused imports is a nice thing to do, their presence does not actually indicate any potential issues with our code.

Reason

Reason is a new interface to OCaml

When to evaluate strictly in Haskell?

Is there some way to detect when lazy evaluation will get in the way of performance?

Who invented proxy passing and when?

Then someone figured out the proxy idiom, and everything changed.