The performance design metric
{"Image DocumentName": "The performance design metric", "Image ImageDescription": "Widely-used measure of system, widely-abused. Clock frequency, instructions per second \u2013 not good measures. Digital camera example \u2013 a user cares about how fast it processes images, not clock speed or instructions per second. Latency (response time) Time between task start and end. e.g., Camera\u2019s A and B process images in 0.25 seconds. Throughput. Tasks per second, e.g. Camera A processes 4 images per second. Throughput can be more than latency seems to imply due to concurrency, e.g. Camera B may process 8 images per second (by capturing a new image while previous image is being stored). Speedup of B over S = B\u2019s performance / A\u2019s performance. Throughput speedup = 8/4 = 2.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}