On July 8, Hanyang University announced that its research team headed by Won You-jip, professor of the Department of Computer Science and Engineering, succeeded in developing a technology called Write Ahead Logging Direct IO (WALDIO), which can greatly improve the speed and battery life expectancy of smartphones.
The main principle of this tech is to not record unnecessary data on a smartphone. Professor Won confirmed that the phenomenon that the longer smartphones are used, the slower they become is real. He said that it is attributable to worsening product performance stemming from repeated data storage and deletion in flash memory.
The professor explained that the use of the newly-developed tech is likely to speed up smartphones and extend their battery life, since it is possible to drastically reduce the amount of data recorded.
It was confirmed that the speed of smartphones was improved by around 14 times, and smartphones with a non-removable battery worked up to 20 times faster. A decrease in memory usage is expected to extend battery life expectancy by 39 percent or more.
Professor Won explained, “The core of the newly-developed technology is to record a small amount of data,” adding, “This tech will make it possible to use low-priced flash memory for a long time, like expensive flash memory.”
The research findings are scheduled to be presented during the 2015 USENIX Annual Technical Conference (USENIX ATC 2015) in Santa Clara, California from July 8 to 10 (local time). The research team previously received the Best Paper award at USENIX ATC 2013.