bufferfromfile

The module in JavaScript provides convenient means for using files as standard ArrayBuffer making mmap behind the scene.
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wToolsArrayBufferBuffer from fileArrayBuffer from fileTypedBuffer from fileNodejs buffer from filemmapmmap filezero copy

great-big-file-reader

Uses the node addon api to provide native handling of large files using mmap. It provides an interface to create a buffer into the file at specified offsets and lengths, avoiding issues when the file is bigger than the maximum Node buffer size.
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mmaplargefilesmemorymappingbuffers

@rimbu/multimap

An immutable Map where each key can have multiple values
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multimapmmapdictionarymaphashedsortedimmutablecollectionrimbutypescript

@riaskov/mmap-io

Node.js mmap bindings revisited.
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low levelfilememory mappedmmapadvisesyncshared memoryC++performance

mmap-io

io.js/node.js mmap bindings revisited.
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low levelfilememory mappedmmapadvisesyncshared memoryC++performance