Re: reading a large text file that is part of a very tight loop

OK, while this isn;t the exact code, its the relevant section....

     static final int numRatings = 100456599;
     static final int epoch = 100000;

     FileChannel fc = new FileInputStream (filepath).getChannel();
     MappedByteBuffer mappedBuff = fc.map(FileChannel.MapMode.READ_ONLY, 0,
fc.size());

     for (int epoch = 0; epoch < numEpochs; epoch++) {
          mappedBuff.rewind();

          for (int k = 0; k < numRatings; k++) {
               cUser = mappedBuff.getInt();
               cMovie = (int)mappedBuff.getShort();
               cRating = (int)mappedBuff.get();

               //doStuff;

          }
     }