dotty VS Metals

Compare dotty vs Metals and see what are their differences.

dotty

The Scala 3 compiler, also known as Dotty. (by lampepfl)

Metals

Scala language server with rich IDE features 🚀 (by scalameta)
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dotty Metals
62 16
5,213 1,839
0.9% 1.1%
9.9 9.9
3 days ago about 20 hours ago
Scala Scala
Apache License 2.0 Apache License 2.0
The number of mentions indicates the total number of mentions that we've tracked plus the number of user suggested alternatives.
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.

dotty

Posts with mentions or reviews of dotty. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2023-01-24.
  • Scala Resurrection
    6 projects | reddit.com/r/scala | 24 Jan 2023
    Ahhh no unused warnings, thats disappointing to say the least. I guess some progress is being made here https://github.com/lampepfl/dotty/pull/16157 , tbh this kind of stuff makes me want to stick to Scala 2.
  • Scala DevInTraining looking to contribute to projects
    7 projects | reddit.com/r/scala | 15 Jan 2023
  • A new, reworked ScalaDoc is here!
    2 projects | reddit.com/r/scala | 19 Dec 2022
    We just released the new version of ScalaDoc for the standard library API for 3.2.1. I hope you will like it, it contains a lot of changes! https://www.scala-lang.org/api/3.2.1/index.html If you are interested in what exactly was changed, take a look at this PR: https://github.com/lampepfl/dotty/pull/16310
  • Automatic parallelisation of for-comprehensions in Scala 3
    2 projects | reddit.com/r/scala | 20 Nov 2022
    There is quite an old issue on this topic on dotty: https://github.com/lampepfl/dotty/issues/2573 (Nothing (or almost nothing) changed)
  • Scala 3.2.1 released!
    2 projects | reddit.com/r/scala | 10 Nov 2022
    Linting for unused stuff is being worked on, see https://github.com/lampepfl/dotty/pull/16157. Hopefully it'll land soon.
    2 projects | reddit.com/r/scala | 10 Nov 2022
  • Best resource to learn Scalia 3 metaprogramming
    3 projects | reddit.com/r/scala | 13 Oct 2022
    Then start playing with reflection API - I suggest having Quotes opened in your IDE, and documentation in your browser. Use showRaw to print expressions you constructed - it will help you understand how to build from ground up when you cannot build something using only expressions.
  • Scala 3.2 released!
    2 projects | reddit.com/r/scala | 8 Sep 2022
    This was taken care of recently: https://github.com/lampepfl/dotty/pull/15540/files
  • Eval 0.1.0 released
    4 projects | reddit.com/r/scala | 28 Mar 2022
    A more limited way to do runtime evaluation is via the jsr-223 support: https://github.com/lampepfl/dotty/blob/main/tests/run-with-compiler/scripting.scala, you can't reflect on types that way but the advantage is that you don't end up depending on compiler-internals APIs that could change in any patch release.
    4 projects | reddit.com/r/scala | 28 Mar 2022
    https://github.com/lampepfl/dotty/issues/14262 points to https://github.com/invesdwin/invesdwin-context/blob/master/invesdwin-context-parent/invesdwin-context-scala/src/main/java/de/invesdwin/context/scala/pool/WrappedScalaScriptEngine.java which seems to be doing some caching via https://docs.oracle.com/javase/8/docs/api/javax/script/Compilable.html, but I have zero experience with this stuff.

Metals

Posts with mentions or reviews of Metals. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2023-01-09.

What are some alternatives?

When comparing dotty and Metals you can also consider the following projects:

intellij-plugins - Open-source plugins included in the distribution of IntelliJ IDEA Ultimate and other IDEs based on the IntelliJ Platform

sbt - sbt, the interactive build tool

scalajs-benchmark - Benchmarks: write in Scala or JS, run in your browser. Live demo:

Scalatex - Programmable, Typesafe Document Generation

Jupyter Scala - A Scala kernel for Jupyter

Mill - Your shiny new Java/Scala build tool!

scalafmt - This repo is now a fork of --->

bloop - Bloop is a build server and CLI tool to compile, test and run Scala fast from any editor or build tool.

Scoverage - Scoverage Scala Code Coverage Core Libs

Scalastyle - scalastyle

Wartremover - Flexible Scala code linting tool