Java store boolean array in file and read fast -

i need store boolean array 80,000 items in file. don't care how time saving takes, i'm interested in loading time of array. did't try store dataoutputstream because requires access each value.

i tried make 3 approaches, such as:

1. serialize boolean array
2. use bitset instead of boolean array serialize it
3. transfer boolean array byte array, 1 true , 0 false appropriately , write filechannel using bytebuffer

to test reading files these approaches, had run each approach 1,000 times in loop. got results this:

1. deserialization of boolean array takes 574 ms
2. deserialization of bitset - 379 ms
3. getting byte array filechannel mappedbytebuffer - 170 ms

the first , second approaches long, third, perhaps, not approach @ all.

perhaps there best way accomplish it, need advice

edit

each method ran once

1. 13.8
2. 8.71
3. 6.46 ms appropriatively

what writing byte each boolean , develop custom parser? propably 1 of fastest methods. if want save space put 8 booleans 1 byte require bit shifting operations.

here short example code:

public void save() throws ioexception {     boolean[] testdata = new boolean[80000];     for(int x=0;x < testdata.length; x++)     {         testdata[x] = math.random() > 0.5;     }     fileoutputstream stream = new fileoutputstream(new file("test.bin"));      (boolean item : testdata)     {         stream.write(item ? 1 : 0);     }     stream.close(); }  public boolean[] load() throws ioexception {     long start = system.nanotime();     file file = new file("test.bin");     fileinputstream inputstream = new fileinputstream(file);     int filelength = (int) file.length();      byte[] data = new byte[filelength];     boolean[] output = new boolean[filelength];      inputstream.read(data);     (int x = 0; x < data.length; x++)     {         if (data[x] != 0)         {             output[x] = true;             continue;         }         output[x] = false;     }     long end = system.nanotime() - start;     console.log("time: " + end);     return output; } 

it takes 2ms load 80.000 booleans. tested jdk 1.8.0_45