Image provider blocking the UI thread
| Affects | Status | Importance | Assigned to | Milestone | |
|---|---|---|---|---|---|
| Thumbnailer |
Fix Released
|
High
|
Albert Astals Cid | ||
| thumbnailer (Ubuntu) |
Fix Released
|
High
|
Albert Astals Cid | ||
Bug Description
Steps:
* add some music to your device (phone or desktop is fine)
* [on desktop] install unity8 and run "unity8-dash -mousetouch"
* bottom-swipe to the Manage screen
* select the "My Music" scope
* scroll quickly
Expected:
* scope scrolls smoothly, even if there's no images
Current:
* scope scrolling blocked for seconds at a time
This seems to be most visible the first time, when images are not cached on disk yet.
AFAIK the impact of this is elevated by the fact that Qt serializes requests to image providers, so when it's blocked to download one image, it will not continue to the next image etc.
ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: qtdeclarative5-
Uname: Linux 3.18.0-
ApportVersion: 2.15.1-0ubuntu2
Architecture: amd64
CurrentDesktop: Unity
Date: Tue Jan 13 14:26:35 2015
SourcePackage: thumbnailer
SystemImageInfo:
current build number: 0
device name:
channel: daily
last update: Unknown
UpgradeStatus: No upgrade log present (probably fresh install)
Related branches
- Victor Thompson (community): Approve
- Michi Henning (community): Approve
- PS Jenkins bot (community): Approve (continuous-integration)
- Jussi Pakkanen (community): Approve
-
Diff: 109 lines (+26/-8)4 files modifiedplugins/Ubuntu/Thumbnailer/albumartgenerator.cpp (+9/-3)
plugins/Ubuntu/Thumbnailer/albumartgenerator.h (+4/-1)
plugins/Ubuntu/Thumbnailer/artistartgenerator.cpp (+9/-3)
plugins/Ubuntu/Thumbnailer/artistartgenerator.h (+4/-1)
| Michał Sawicz (saviq) wrote | #1 |
| Jussi Pakkanen (jpakkane) wrote | #2 |
| Changed in thumbnailer (Ubuntu): | |
| status: | New → In Progress |
| importance: | Undecided → Critical |
| importance: | Critical → High |
| assignee: | nobody → Albert Astals Cid (aacid) |
| Changed in thumbnailer: | |
| status: | New → In Progress |
| importance: | Undecided → High |
| assignee: | nobody → Albert Astals Cid (aacid) |
| Launchpad Janitor (janitor) wrote | #3 |
| Changed in thumbnailer (Ubuntu): | |
| status: | In Progress → Fix Released |
| Changed in thumbnailer: | |
| status: | In Progress → Fix Released |
Qt's documentation says this:
To force asynchronous image loading, even for image sources that do not have the asynchronous property set to true, you may pass the QQuickImageProv
This is exactly what thumbnailer does (thumbnailgener