dcrypt.benchmark.BlockCipherBenchmark source code

1 module dcrypt.benchmark.BlockCipherBenchmark;
2 
3 import dcrypt.benchmark.Benchmark;
4 import dcrypt.blockcipher.blockcipher;
5 import std.conv;
6 import std.algorithm: swap;
7 
8 public class BlockCipherBenchmark: Benchmark {
9 	
10 	private IBlockCipher cipher;
11 	 
12 	this (IBlockCipher c){
13 		cipher = c;
14 	}
15 
16 	@property
17 	static string[] header() {
18 		return ["algorithm", "encrypt MB/s", "decrypt MB/s"];
19 	}
20 	
21 	override string[] benchmark(ulong length) {
22 
23 		cipher.start(true, new ubyte[16], new ubyte[16]);
24 		
25 		double encrSpeed = getSpeed(length)*1e-6;
26 		
27 		cipher.start(false, new ubyte[16], new ubyte[16]);
28 		
29 		double decrSpeed = getSpeed(length)*1e-6;
30 
31 		return [cipher.name, numberFormat(encrSpeed), numberFormat(decrSpeed)];
32 	}
33 	
34 	private double getSpeed(ulong length) {
35 		ubyte[] blockA = new ubyte[cipher.blockSize()];
36 		ubyte[] blockB = new ubyte[cipher.blockSize()];
37 		StopWatch sw;
38 		sw.reset();
39 		sw.start();
40 		foreach(size_t i; 0 .. length/blockA.length) {
41 			
42 			cipher.processBlock(blockA, blockB);
43 			swap(blockA, blockB);
44 		}
45 		sw.stop();
46 		
47 		double speed = 1e9 * length / sw.peek().nsecs();
48 		return speed;
49 	}
50 	
51 }