A payload object, such as a JSON object, includes a plurality of elements is converted to an array file by individually serializing the elements. A header is written to the array file that includes the number of elements and an offset to the start of each element of the serialized elements. The serialized elements are written after the header. Thereafter, an individual serialized elements is read by first reading the offset corresponding to the individual serialized element from the header and reading data starting at the offset.