DEVICE PERFORMANCE ISSUE OPTIMIZATION

Methods, systems, and apparatus, including computer programs encoded on computer storage media, for optimizing performance issues. One of the methods includes maintaining, for a plurality of devices at least some of which have different contexts, metric data for an application that executed on each of the plurality of devices; determining, for a metric attribute from a plurality of metric attributes and a subset of the plurality of devices each of which have at least one common context, a potential performance issue for the subset of the plurality of devices using aggregated metric data for the metric attribute; determining, using at least a portion of the aggregated metric data, a portion of a code base or a hardware subcomponent that likely caused the potential performance issue; and providing data for the portion of the code base or the hardware subcomponent that likely caused the potential performance issue.