J2ME Phone Memory Test

 

Nokia Series 40 platform 메모리 최적화 과정중에 발견한 결과들

 

1. Just Creating InputStream of size 9215, 5722
7210
200412 - 191180 = 9232 bytes(9215 bytes)
200412 - 194672 = 5740 bytes(5722 bytes)

6230
7647680 - 7638444 = 9236 bytes(9215 bytes)
7647680 - 7641936 = 5744 bytes(5722 bytes)

... InputStream object size is as large as the file size.

 

2. Creating InputStream & Image of size 442
7210 : 1968  bytes
6230 : 972 bytes
... 7210 may have stupid implementation
 
3. Creating Image by createImage of size 442
7210 : 1508 bytes
6230 : 512 bytes

 

4. Comparision between 2 & 3
1968 - 1508 = 460 ( ~ 442)
972 - 512 = 460 ( ~ 442)
... this result confirms 1.