The test i have done was writing a new sms, the keyboard is working very fast. After finishing the sms, i did two things : delete all the caracters typed and close the messaging program, then check memory reporting (24.6 MB)
Soft reset but Asus is going back to standar keyboard, so i configured it againg to PCM. Then type a new sms and this time i sent it out. The free memory reporting againg 24.6 MB.
Using Menmaid, it is reporting : device.exe 6.5 MB , filesys.exe 2.31 MB
Don't forget that it is not keeping the sip configuration after softreset.