I measure the speed of copying files to/from the SD card at about 5MB/
sec on my G1, however the following speed test tops out at about 250kB/
sec read and 125kB/sec write. (The example shown writes to the
internal SD card, but writing to the removable card is about the same
speed.) Why is it so slow? (Using NIO channels to write whole arrays
of bytes doesn't speed it up by much...)
--
long startTime = System.currentTimeMillis();
BufferedOutputStream writer = new BufferedOutputStream(openFileOutput
("speedtest", MODE_PRIVATE));
int size = 1000000;
for (int i = 0; i < size; i++)
writer.write((byte) 0);
writer.close();
Log.i("speedtest", "speed test a: " + (System.currentTimeMillis() -
startTime));
startTime = System.currentTimeMillis();
BufferedInputStream in = new BufferedInputStream(openFileInput
("speedtest"));
for (int i = 0; i < size; i++)
in.read();
in.close();
Log.i("speedtest", "speed test b: " + (System.currentTimeMillis() -
startTime));
startTime = System.currentTimeMillis();
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