JVM doesn't know about generic types at the runtime. There's no specialization o... | Hacker News

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eonwe on Sept 9, 2016 | parent | context | favorite | on: Incremental Compilation

JVM doesn't know about generic types at the runtime. There's no specialization of HashMaps, it's just arrays of points to objects all around.

With project Valhalla: https://en.wikipedia.org/wiki/Project_Valhalla_(Java_languag... there's been talk about specialization for value types.

pjmlp on Sept 9, 2016 | [–]

It is already available for those that want to play with it.

https://adoptopenjdk.gitbooks.io/adoptopenjdk-getting-starte...

enitihas on Sept 9, 2016 | [–]

I too thought the same. That's why pcwalton's comment confused me.

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