find #photoai bottleneck thanks to @daniellockyer with NewRelic and it was the average photo waiting time calculator SQL query that took 18 seconds and ran hourly and would take down the site
make #photoai landing page use a single sample photos cache created by /workers/generateSamplesAndPromptsCache.php for the header photos and the camera roll below to stop it taking down the site when it does the SQL query on the page load