Avoid drupal bootstrap for each image styles in private filesystem Consider a scenario, where large number of images are attached to a node and they are displayed as thumbnail gallery when that node is displayed/rendered. The node has access control so it displayed accordingly. All images and corresponding image styles are stored on private file system.

Since every thumbnail is accessed from private filesystem it incurs a high latency due to permission check an every image.

Is it possible to avoid bootstrap/permission check for every image when they are displayed/rendered as a part of a specific node? So behave like public filesystem in this special case only. When any item is directly accessed via url, the permission checks kick in as they normally do for private filesystem.
No because it are separate http(s) requests. Every requests needs to redo the check.