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High memory usage with optimizations

Status: Open.

#1322 In effekt-lang/effekt;

· marvinborner opened on Mar 9, 2026

java.lang.ClassCastException when handling an effect alias of an interface

bugSomething isn't workingSomething isn't working

errormessage

first-hackathon-issueGood issue for a first hackathon contributionGood issue for a first hackathon contribution

Status: Open.

#1318 In effekt-lang/effekt;

· marvinborner opened on Mar 6, 2026

Add missing IO benchmarks to benchmark configs for JS and LLVM

Status: Open.

#1314 In effekt-lang/effekt;

· jiribenes opened on Mar 6, 2026

Move 'json::readDouble' to 'scanner', refactor it, and test it

area:stdlib

first-hackathon-issueGood issue for a first hackathon contributionGood issue for a first hackathon contribution

quality-of-life

refactoring

Status: Open.

#1313 In effekt-lang/effekt;

· jiribenes opened on Mar 6, 2026

collection::collectInto / collection::collect(reserve: Int)

area:stdlib

requires-design

Status: Open.

#1309 In effekt-lang/effekt;

· jiribenes opened on Mar 3, 2026

Type annotations for patterns

area:parser/lexer

area:patternmatching

area:typer

Status: Open.

#1308 In effekt-lang/effekt;

· jiribenes opened on Mar 3, 2026

Add 'random::shuffle' for shuffling arrays

area:stdlib

first-hackathon-issueGood issue for a first hackathon contributionGood issue for a first hackathon contribution

Status: Open.

#1307 In effekt-lang/effekt;

· jiribenes opened on Mar 3, 2026

Add println for Char

area:stdlib

good first issueGood for newcomersGood for newcomers

Status: Open.

#1302 In effekt-lang/effekt;

· phischu opened on Feb 28, 2026

Greater-than sign after splice ending throws error

area:parser/lexer

bugSomething isn't workingSomething isn't working

first-hackathon-issueGood issue for a first hackathon contributionGood issue for a first hackathon contribution

quality-of-life

Status: Open.

#1301 In effekt-lang/effekt;

· marvinborner opened on Feb 27, 2026

Always specialize non-recursive functions with regard to their function arguments

experimentExperimental branch, do not merge!Experimental branch, do not merge!

featureNew feature or requestNew feature or request

Status: Open.

#1290 In effekt-lang/effekt;

· phischu opened on Jan 20, 2026

Compiler panic "?C should be a concrete capture set in this phase."

bugSomething isn't workingSomething isn't working

Status: Open.

#1289 In effekt-lang/effekt;

· marvinborner opened on Jan 19, 2026

Multiple return values in Core

area:core

featureNew feature or requestNew feature or request

Status: Open.

#1285 In effekt-lang/effekt;

· phischu opened on Jan 13, 2026