GitHub - xerial/larray: Large off-heap arrays and mmap files for Scala and Java

LArray can create arrays with more than 2G(2^31) entries. 2^31 -1 (2G) is the limitation of the default Java/Scala array size, because these arrays use 32-bit signed integer (int) as indexes. LArray uses long type indexes of 64-bit signed integers to resolve this limitation. For example, the entire human genome data (3GB) can be stored in LArray. LArray can be released immediately from the memory.

[takuya-a]

メモリアロケーションの速度が効いてくるようなライブラリ書くときとかにめっちゃよさそう。off-heapとかUnsafeなやつはこうしてライブラリの形で疎結合になってるとよい。

[taroleo]

Large off-heap arrays and memory-mapped file (mmap) for Java and Scala

[potato777]

“A library for managing large off-heap arrays that can hold more than 2G (2^31) entries in Java and Scala.”

[yass]

" A library for managing large off-heap arrays that can hold more than 2G (2^31) entries in Java and Scala. Notably LArray is disposable by calling LArray.free or you can let GC automatically release the memory. LArray can be used to create an mmap (memory-mapped file) whose size is more than 2GB. "

[terurou]

Java/Scalaで2G Entry以上の配列を扱うライブラリ

[heavenshell]

"A library for managing large off-heap arrays that can hold more than 2G (2^31) entries in Java and Scala."