New Relic

imgproxy can send its metrics to New Relic. To use this feature, do the following:

Register at New Relic to get license key;
Set IMGPROXY_NEW_RELIC_KEY environment variable to the license key;
(optional) Set IMGPROXY_NEW_RELIC_APP_NAME environment variable to the desired application name.

imgproxy will send the following info to New Relic:

CPU and memory usage;
Response time;
Image downloading time;
Image processing time;
Errors that occurred while downloading and processing image.