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Chris Tate
11a5da9b84
Buffer.from of strings, arrays and Uint8Arrays, Buffer.allocUnsafe and Buffer.concat now return views into a per-thread pool slab of Buffer.poolSize bytes (64 KiB by default) when the size is below Buffer.poolSize >>> 1, following Node's allocate, fromStringFast and fromArrayLike: 8-byte aligned offsets, a new slab when a request does not fit, and the four-bytes-per-unit reservation for strings. Buffer.poolSize can be read and set, and Buffer.allocUnsafeSlow returns an unpooled Buffer. A slab lives while any of its views does. Its ArrayBuffer cannot be transferred, and structuredClone of a typed array view copies the whole ArrayBuffer and keeps the view's offset. Buffer.alloc, allocUnsafe and allocUnsafeSlow validate sizes with Node's ERR_OUT_OF_RANGE error.