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Issues list

finding unreachable case clause on huge enum blows up compile time even it does not have guard clause patmat performance
#12873 opened Sep 17, 2023 by KisaragiEffective Backlog
@dwijnand
10
Shrinkable#subtractAll on non-Set/-Map types has abysmal performance library:collections performance
#12179 opened Oct 5, 2020 by NthPortal Backlog
1
Champ (Map/Set) Iterators should expose their knownSize enhancement library:collections performance
#11606 opened Jul 2, 2019 by joshlemer Backlog
3
Consider using of tzcnt instruction for better performance in foreach loop and iterator of bitsets backend library:collections performance
#11418 opened Feb 27, 2019 by plokhotnyuk Backlog
1
Optimise immutable.Queue for head/tail has PR library:collections performance
#11396 opened Feb 9, 2019 by NthPortal Backlog
@NthPortal
8
Should duplicating/splitting iterators use LazyList instead of internal queues/buffers? library:collections performance
#11377 opened Jan 22, 2019 by NthPortal
6
2.12 performance regression from ArrayOps allocations on vectors/seqs library:collections performance
#11304 opened Dec 11, 2018 by twenovales Backlog
5
Create new trait MapBuilder extending Builder, which adds non-allocating addOne method library:collections library performance
#11297 opened Dec 9, 2018 by joshlemer Backlog
s.c.m.Shrinkable#subtractAll could return early once this is known to be empty. library:collections library performance
#11269 opened Nov 22, 2018 by joshlemer Backlog
3
Compiler gets stuck in GC while SubstSym fixed in Scala 3 This issue does not exist in the Scala 3 compiler (https://github.com/lampepfl/dotty/) performance
#11249 opened Nov 12, 2018 by lrytz Backlog
7
Investigate potential alternative data structures for s.c.i.HashCollision{Map,Set}Node library:collections performance
#11164 opened Sep 20, 2018 by joshlemer Backlog
1
reduce ScalaRunTime array type checking library performance
#10968 opened Jul 2, 2018 by isaacl Backlog
2
A reflective call is generated while no reflective call warning is shown backend byname bytecode performance
#10666 opened Dec 21, 2017 by Atry Backlog
3
Surface expensive macro invocations by default enhancement performance
#10558 opened Oct 19, 2017 by gkossakowski
4
Use a circular buffer implementation for mutable.ArrayBuffer enhancement help wanted library:collections library performance
#10167 opened Jan 30, 2017 by scabug Backlog
1
Compiler performance regression in pattern matcher analysis patmat performance regression
#10092 opened Dec 5, 2016 by scabug
5
Memory leak in SynchronizedTypes.uniques performance reflection
#9537 opened Oct 27, 2015 by scabug Backlog
@retronym
4
Consider introducing special cases for TypeRefs of small arity enhancement performance typer
#7186 opened Feb 26, 2013 by scabug Backlog
@retronym
12
lubResults/glbResults are leaking performance typer
#6437 opened Sep 27, 2012 by scabug
@retronym
8
optimizing collection creation optimizer performance
#6247 opened Aug 16, 2012 by scabug Backlog
8
inferMethodAlternative (and friends) can produce lots of silent errors that call expensive string ops infer performance typer usability
#6149 opened Jul 27, 2012 by scabug Backlog
4
keep method-local lazy vals on the stack when possible enhancement performance
#5246 opened Nov 29, 2011 by scabug Backlog
3
Specialization generates bytecode that violates polymorphism if a sub-class is specialized and provides a specialized type parameter performance specialization
#4971 opened Sep 6, 2011 by scabug Backlog
3
Standard inheritance pattern with specialization yields compiler crash compiler crash performance specialization
#4790 opened Jul 11, 2011 by scabug
3
ArrayBuffer[Int] is 20x slower than it could be enhancement library:collections performance
#4596 opened May 16, 2011 by scabug Backlog
2
ProTip! What’s not been updated in a month: updated:<2024-12-23.