Memory access operations based on scores

A method comprising:

• receiving, at a data management system, data values from one or more data sources;
• storing, by the data management system, the data values in a time order in a first data structure in a memory of the data management system;
• computing, by the data management system, a plurality of scores based on time distances of the data values to neighbor data values in the first data structure, wherein a first score for a first data value in an end entry of the first data structure is based on a time distance of the first data value to a neighbor data value on a first side of the first data value in the first data structure, and a default time distance representing an absence of a neighbor data value on a second side of the first data value in the first data structure, and wherein a second score for a second data value in an intermediate entry of the first data structure is based on a time distance of the second data value to a first neighbor data value on a first side of the second data value in the first data structure, and a time distance of the second data value to a second neighbor data value on a second side of the second data value in the first data structure;
• storing, by the data management system, the plurality of scores in a second data structure in a score value order;
• and
• perform an access operation on the data values in the first data structure based on the plurality of scores, wherein the access operation removes a selected data value from the first data structure;
• and
• computing, by the data management system, an updated score for a given data value in the first data structure based on a changed time distance of the given data value to a neighbor data value caused by the removal of the selected data value from the first data structure.