PerfChecker Research
Project
Contact: andrewust@cse.ust.hk
Contact: andrewust@cse.ust.hk
Researchers
Problems detected by PerfChecker
We designed algorithms
to automatically detect our
identified bug patterns.
We implemented our algorithms as a prototype tool named "PerfChecker".
To validate the usefulness of PerfChecker, we applied it to analyze 29
popular real-world Android applicaitons. These applications comprises
more than 1.1 million lines of code. PerfChecker detected 126
previously unknown performance issues in them. We submitted bug reports
to developers and so far 68 reported issues have been confirmed as real
bugs. Developers also quickly fixed 20 of them by following our
optimization suggestions. This webpage gives the information
of
concerned subjects and lists all problems detected by PerfChecker.
1. Subject applications
| Application
name |
Application category | Revision
no. |
Size
(LOC) |
Downloads |
| Ushahidi |
Communication | 59fbb533d0 |
43.3K |
10K
- 50K |
| c:geo | Entertainment | 6e4a8d4ba8 | 37.7K | 1M - 5M |
| Omnidroid | Productivity | 865 | 12.4K | 1K - 5K |
| Open GPS Tracker | Travel & Local | 14ef48c15d | 18.1K | 100K - 500K |
| Geohash Droid |
Entertainment | 65bfe32755 | 7.0K | 10K - 50K |
| Android Wifi Tether | Communication | 570 | 9.2K | 1M - 5M |
| Osmand |
Travel & Local | 8a25c617b1 | 77.4K | 500K - 1M |
| My Tracks | Health & Fitness | e6b9c6652f | 27.1K | 10M - 50M |
| WebSMS | Communication | 1f596fbd29 | 7.9K | 100K - 500K |
| XBMC Remote | Media & Video | 594e4e5c98 | 53.3K | 1M - 5M |
| ConnectBot | Communication | 716cdaa484 | 33.7K | 1M - 5M |
| Firefox | Communication | 895a9905dd | 122.9K | 10M - 50M |
| APG | Communication | a6a371024b | 98.2K | 50K - 100K |
| FBReaderJ | Books & References | 0f02d4e923 | 103.4K | 5M - 10M |
| Bitcoin Wallet | Finance | 12ca4c71ac | 35.1K | 100K - 500K |
| AnySoftKeyboard | Tools | 04bf623ec1 | 26.0K | 500K - 1M |
| OI File Manager | Productivity | f513b4d0b6 | 7.8K | 5M - 10M |
| IMSDroid | Media & Video | 553 | 21.9K | 100K - 500K |
2. Detected problems
| Application
name |
# bug instances (HC) | #
bug instance (LM) |
| Ushahidi |
9** | 2* |
| c:geo | 0 | 5* |
| Omnidroid | 9 | 8 |
| Open GPS Tracker | 1 | 0 |
| Geohash Droid |
0 | 1 |
| Android Wifi Tether | 1 | 3 |
| Osmand |
18* | 17* |
| My Tracks | 2** | 0 |
| WebSMS | 0 | 1* |
| XBMC Remote | 1 | 0 |
| ConnectBot | 0 | 6 |
| Firefox | 1* | 0 |
| APG | 4 | 8 |
| FBReaderJ | 6** | 6 |
| Bitcoin Wallet | 4* | 0 |
| AnySoftKeyboard | 2** | 0 |
| OI File Manager | 1** | 0 |
| IMSDroid | 10 | 0 |
Notes: "HC" stands for "frequently invoked Heavy-weight Callbacks". "LM" stands for "Lengthy operations in Main thread". "*" means "confirmed", and "**" means "confirmed and fixed".