How to write an array of doubles to a file very fast in C#? -

i want write file:

filestream output = new filestream("test.bin", filemode.create, fileaccess.readwrite); binarywriter binwtr = new binarywriter(output); double [] = new double [1000000];  //this array fill complete  for(int = 0; < 1000000; i++) {     binwtr.write(a[i]); } 

and unfortunately code's process last long! (in example 10 seconds!)

the file format binary.

how can make faster?

you should able speed process converting array of doubles array of bytes, , write bytes in 1 shot.

this answer shows how conversion (the code below comes answer):

static byte[] getbytes(double[] values) {     var result = new byte[values.length * sizeof(double)];     buffer.blockcopy(values, 0, result, 0, result.length);     return result; } 

with array of bytes in hand, you can call write takes array of bytes:

var bytebuf = getbytes(a); binwtr.write(bytebuf);