On 21/11/2013 17:02, Dan Xu wrote:
Hi Alan,
I think the map is used to enlarge the size of the largeFile to
testSize + 10. In initTestFile(), it initiates the file with size 10.
My understanding is that it avoids writing large amount of data into
the largeFile by using the map. Thanks!
-Dan
Okay, I guess I was really just wondering about the reliability on
Windows as sometimes tests that use memory mapped files are troublesome
when it comes to clean-up after the test. Also as this test hasn't run
on Windows before then I wonder about how long initTestFile will take to
create the 4GB file. You've probably measured already but if you need a
speed up then you could change initTestFile to use a FIleChannel and
create the file with the SPARSE option. Then just position to size-1 and
write 1 byte. That should be faster than writing "e" 4 billion times.
-Alan.
