String Hashcode Performance

Main.java

package leviathan143.stringhashtest;

import java.util.ArrayList;
import java.util.List;
import java.util.Random;

public class Main 
{
	private static final char[] ALPHABET = "abcdefghijklmnopqrstuvwxyz".toCharArray();
	private static final Random rand = new Random();

	private static int minLen = 1;
	private static int maxLen = 3;
	private static int iterations = 10000;

	public static void main(String[] args) 
	{
		parseArgs(args);
		for(int l = minLen; l <= maxLen; l++)
		{
			List<String> generatedStrings = new ArrayList<String>(iterations);
			for(int i = 0; i < iterations; i++)
			{
				generatedStrings.add(generateString(l));
			}
			List<Long> stringHashTimes = new ArrayList<Long>(iterations);
			for(String string : generatedStrings)
			{
				long startTime = System.nanoTime();
				string.hashCode();
				long finishTime = System.nanoTime() - startTime;
				stringHashTimes.add(finishTime);
			}
			System.out.println("Avg. hash time for " + iterations + " randomly generated strings of length " + l + ": " + computeAvgTime(stringHashTimes) + " ns");
		}
	}

	private static void parseArgs(String[] args)
	{
		String nextArg = "";
		for(int a = 0; a < args.length; a++)
		{
			if(args[a].startsWith("-"))
			{
				if((a + 1) < args.length) nextArg = args[a + 1];
				else System.out.println("Missing parameter for argument " + args[a]);
				switch (args[a])
				{
				case "-min":
					minLen = Integer.parseInt(nextArg);
					break;

				case "-max":
					maxLen = Integer.parseInt(nextArg);
					break;

				case "--I":
				case "-iterations":
					iterations = Integer.parseInt(nextArg);
					break;

				default:
					System.out.println("Unknown argument: " + args[a]);
					break;
				}
			}
		}
	}

	private static String generateString(int length)
	{
		char[] stringChars = new char[length];
		for(int c = 0; c < length; c++)
		{
			stringChars[c] = ALPHABET[rand.nextInt(ALPHABET.length)];
		}
		return String.valueOf(stringChars);
	}
	
	private static long computeAvgTime(List<Long> times)
	{
		long sum = 0;
		for(long time : times)
		{
			sum += time;
		}
		return sum / iterations;
	}
}

results.txt

A length of 16 is the best case scenario(1 letter modid + 3 3 letter hashes and "horse/")
A length of 79 is the worst case scenario(64 letter modid + 3 3 letter hashes and "horse/")
Generated with args: -min 16 -max 79 --I 1000000
Avg. hash time for 1000000 randomly generated strings of length 16: 19 ns
Avg. hash time for 1000000 randomly generated strings of length 17: 31 ns
Avg. hash time for 1000000 randomly generated strings of length 18: 29 ns
Avg. hash time for 1000000 randomly generated strings of length 19: 19 ns
Avg. hash time for 1000000 randomly generated strings of length 20: 24 ns
Avg. hash time for 1000000 randomly generated strings of length 21: 35 ns
Avg. hash time for 1000000 randomly generated strings of length 22: 27 ns
Avg. hash time for 1000000 randomly generated strings of length 23: 25 ns
Avg. hash time for 1000000 randomly generated strings of length 24: 20 ns
Avg. hash time for 1000000 randomly generated strings of length 25: 32 ns
Avg. hash time for 1000000 randomly generated strings of length 26: 25 ns
Avg. hash time for 1000000 randomly generated strings of length 27: 39 ns
Avg. hash time for 1000000 randomly generated strings of length 28: 35 ns
Avg. hash time for 1000000 randomly generated strings of length 29: 37 ns
Avg. hash time for 1000000 randomly generated strings of length 30: 36 ns
Avg. hash time for 1000000 randomly generated strings of length 31: 30 ns
Avg. hash time for 1000000 randomly generated strings of length 32: 24 ns
Avg. hash time for 1000000 randomly generated strings of length 33: 32 ns
Avg. hash time for 1000000 randomly generated strings of length 34: 30 ns
Avg. hash time for 1000000 randomly generated strings of length 35: 37 ns
Avg. hash time for 1000000 randomly generated strings of length 36: 43 ns
Avg. hash time for 1000000 randomly generated strings of length 37: 49 ns
Avg. hash time for 1000000 randomly generated strings of length 38: 39 ns
Avg. hash time for 1000000 randomly generated strings of length 39: 39 ns
Avg. hash time for 1000000 randomly generated strings of length 40: 32 ns
Avg. hash time for 1000000 randomly generated strings of length 41: 31 ns
Avg. hash time for 1000000 randomly generated strings of length 42: 47 ns
Avg. hash time for 1000000 randomly generated strings of length 43: 47 ns
Avg. hash time for 1000000 randomly generated strings of length 44: 46 ns
Avg. hash time for 1000000 randomly generated strings of length 45: 46 ns
Avg. hash time for 1000000 randomly generated strings of length 46: 46 ns
Avg. hash time for 1000000 randomly generated strings of length 47: 55 ns
Avg. hash time for 1000000 randomly generated strings of length 48: 61 ns
Avg. hash time for 1000000 randomly generated strings of length 49: 57 ns
Avg. hash time for 1000000 randomly generated strings of length 50: 56 ns
Avg. hash time for 1000000 randomly generated strings of length 51: 45 ns
Avg. hash time for 1000000 randomly generated strings of length 52: 36 ns
Avg. hash time for 1000000 randomly generated strings of length 53: 47 ns
Avg. hash time for 1000000 randomly generated strings of length 54: 55 ns
Avg. hash time for 1000000 randomly generated strings of length 55: 52 ns
Avg. hash time for 1000000 randomly generated strings of length 56: 61 ns
Avg. hash time for 1000000 randomly generated strings of length 57: 65 ns
Avg. hash time for 1000000 randomly generated strings of length 58: 58 ns
Avg. hash time for 1000000 randomly generated strings of length 59: 57 ns
Avg. hash time for 1000000 randomly generated strings of length 60: 59 ns
Avg. hash time for 1000000 randomly generated strings of length 61: 62 ns
Avg. hash time for 1000000 randomly generated strings of length 62: 62 ns
Avg. hash time for 1000000 randomly generated strings of length 63: 65 ns
Avg. hash time for 1000000 randomly generated strings of length 64: 66 ns
Avg. hash time for 1000000 randomly generated strings of length 65: 69 ns
Avg. hash time for 1000000 randomly generated strings of length 66: 70 ns
Avg. hash time for 1000000 randomly generated strings of length 67: 71 ns
Avg. hash time for 1000000 randomly generated strings of length 68: 74 ns
Avg. hash time for 1000000 randomly generated strings of length 69: 92 ns
Avg. hash time for 1000000 randomly generated strings of length 70: 78 ns
Avg. hash time for 1000000 randomly generated strings of length 71: 56 ns
Avg. hash time for 1000000 randomly generated strings of length 72: 66 ns
Avg. hash time for 1000000 randomly generated strings of length 73: 74 ns
Avg. hash time for 1000000 randomly generated strings of length 74: 77 ns
Avg. hash time for 1000000 randomly generated strings of length 75: 74 ns
Avg. hash time for 1000000 randomly generated strings of length 76: 77 ns
Avg. hash time for 1000000 randomly generated strings of length 77: 82 ns
Avg. hash time for 1000000 randomly generated strings of length 78: 82 ns
Avg. hash time for 1000000 randomly generated strings of length 79: 80 ns