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use Vector instead of List. avoid O(n) append

This commit is contained in:
xuwei-k 2019-08-29 21:37:02 +09:00
parent 1ee20ef11d
commit 1f3ce5f9ee
1 changed files with 2 additions and 2 deletions
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4
internal/util-collection/src/main/scala/sbt/internal/util/Settings.scala
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@ -228,10 +228,10 @@ trait Init[ScopeType] {
((IMap.empty: ScopedMap) /: init)((m, s) => add(m, s))
def add[T](m: ScopedMap, s: Setting[T]): ScopedMap =
m.mapValue[T](s.key, Nil, ss => append(ss, s))
m.mapValue[T](s.key, Vector.empty[Setting[T]], ss => append(ss, s))
def append[T](ss: Seq[Setting[T]], s: Setting[T]): Seq[Setting[T]] =
if (s.definitive) s :: Nil else ss :+ s
if (s.definitive) Vector(s) else ss :+ s
def addLocal(init: Seq[Setting[_]])(implicit scopeLocal: ScopeLocal): Seq[Setting[_]] =
init.par.map(_.dependencies flatMap scopeLocal).toVector.flatten ++ init