Public bug reported:
I'm seeing two requests for thumbnails when scrolling in the photo roll
view.
thumbnailer-service: [23:45:47.191] "thumbnail:
/home/phablet/Pictures/com.ubuntu.camera/image20151104_043132332.jpg (248,0):
0.027926 sec (MISS)"
thumbnailer-service: [23:45:47.201] "thumbnail:
/home/phablet/Pictures/com.ubuntu.camera/image20151104_043132332.jpg (248,248):
0.036288 sec (MISS)"
thumbnailer-service: [23:45:47.608] "thumbnail:
/home/phablet/Pictures/com.ubuntu.camera/image20151104_043130161.jpg (248,0):
0.025118 sec (MISS)"
thumbnailer-service: [23:45:47.619] "thumbnail:
/home/phablet/Pictures/com.ubuntu.camera/image20151104_043130161.jpg (248,248):
0.034762 sec (MISS)"
Note that, for each image, one requests is for (248,0), followed by
another request for (248,248).
This is decidedly sub-optimal because it makes two round-trips to the
thumbnailer for each image and causes the thumbnailer to cache two
thumbnails. This reduces the effectiveness of the cache and wastes CPU.
To reproduce, take around 30 photos. In a shell on the device, run
thumbnailer-admin clear
Run a
tail -f ~/.cache/upstart/dbus.log
Now start the camera app. Change to the photo roll view and slowly
scroll down. As each new image comes into view, there are two requests
sent to the thumbnailer for each image.
** Affects: camera-app
Importance: High
Status: New
** Affects: thumbnailer (Ubuntu)
Importance: Undecided
Status: Triaged
** Also affects: thumbnailer (Ubuntu)
Importance: Undecided
Status: New
** Changed in: thumbnailer (Ubuntu)
Status: New => Triaged
** Changed in: camera-app
Importance: Undecided => High
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https://bugs.launchpad.net/bugs/1517260
Title:
Two thumbnail requests for each image in photo roll view
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