Dear list,
I am working with some large image files (111MB) and I want to save the data
in an x10 Array. It takes a long time to load the data from the storage (5s)
using FileReader.readByte(), hear is a code snippet:
// open file
val fileobject = new File(file);
val filereader = fileobject.openRead();
...
// read array data
val arr = new Array[Byte]([0..width-1, 0..height-1]);
for((i,j) in arr) {
arr(i,j) = filereader.readByte();
}
If I use X10_NTHREADS=1 this code three times faster than X10_NTHREADS=4. I
work on a Intel Quadcore machine and I want to use 4 threads in later
computations. Are there some possibilities to accelerate the IO task? Maybe
with loop chunking or memory mapped files?
Thanks,
Sascha
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