mirror of https://github.com/sbt/sbt.git
f4f185a1c1
Settings0 used to be a Map[Scope, AttributeMap], and is now a Map[ScopedKey[x], x]. This is better because we don't need to decompose all ScopedKey[x] into a Scope and an AttributeKey[x], for recomposing it back later, which duplicates all ScopedKey[x]. It reduces the number of long-living ScopedKey[x] by 8%, and the total number of instances by 1.4%. Also it improves the performance of Settings0, which was responsible of 2.95% of the total CPU time, and is now responsible of 0.41%. |
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