cache_bytes_used += frame_size(*frame);
metric_jpeg_cache_used_bytes = cache_bytes_used;
cache[frame_spec] = LRUFrame{ frame, event_counter++ };
cache_bytes_used += frame_size(*frame);
metric_jpeg_cache_used_bytes = cache_bytes_used;
cache[frame_spec] = LRUFrame{ frame, event_counter++ };