viewing images is very slow

[shoeper]

Viewing images in a folder containing many files is very slow.
I've got a folder with about 1250 images and viewing them in seahub is extremely slow (about 15 seconds wait time). Doing the same in folder with 5 images is very much faster (even with much bigger images).
When clicking on next the seaf-server uses 100% cpu for about 15 seconds. The servers CPU usage before clicking next is below 1 percent.
Edit: To be exact: chrome waits 15-16 seconds every time (so always the same time).
Getting the seafile overview takes 125ms.
Loading the large image folder takes 160ms (showing only first few files), every additional request to load more files names takes ~240ms.

Its a HP Proliant Micro Server G8 - Seafile perfoms very well on it but seahub is a bit slow from time to time. When uploading data I get 100MB/s (~1 Gbit/s - so faster than my computer can compute new blocks). Download speed is from 40-80MB/s constantly so viewing images shouldn't be any issue.
Maybe there is a problem in the way seafile is detecting which photo is being the next.

What about generating a list of files on viewing the first image and then just request the next one from the list via ajax (and maybe use auto preloading).

[freeplant]

Do you view a folder containing images or view a single image file?

[shoeper]

I go into a folder containing many images. I view the first image and then I click next (and then again next and so on). According to chrome, chrome waits 15-16 seconds until the server has processed the request.

[shoeper]

I got what you mean: I view a single image file.
(But if this file is in a library with few files the request is answered fast. If this file is in a folder containing many files the request is answered very slow.)

[freeplant]

This most likely to be caused by calculating "contributor" of a file (showing at the top of the file view). We will remove it and test the performance.

[shoeper]

ok thanks.