BigInFact Æsthetics Codename Edna

BigInFact.java

import java.math.BigInteger;
import java.text.NumberFormat;

/**
 *
 * @author Kenan Sulayman
 * @version Æsthetics Codename Edna
 */

/*
    Loving and living and fighting and falling – flying.
    Growing and playing and praying and pushing - rising.
    
    * But I still love life as I'm flying through the air
    * When I'm playing, never stuck here
    * So I still got to push and rise
    * Even if it's only for a couple more nights
    * Fighting through the bass like the song's my wife
    * Give them an idea how we do this like
*/

public class BigIntFact {
        public static Runtime rt;
        public static BigInteger fa(BigInteger n) {
                BigInteger ret = new BigInteger("1");
                for (BigInteger i = new BigInteger("1"); i.compareTo(n) == -1; i = i.add(new BigInteger("1")))
                ret = ret.multiply(i);
                return ret;
        }
        public static void main(String[] args) {
                rt = rt.getRuntime();
                
                NumberFormat ff = NumberFormat.getInstance();
                StringBuilder sb = new StringBuilder();
                
                long f = rt.freeMemory();
                long a = f / 1024;
                
                System.gc(); System.gc(); System.gc(); System.gc();
                System.gc(); System.gc(); System.gc(); System.gc();
                System.gc(); System.gc(); System.gc(); System.gc();
                System.gc(); System.gc(); System.gc(); System.gc();
                
                System.out.println("Initializing.. o:"+ff.format(a) + "mb.");
                
                sb.append(ff.format(a) + "mb."); // Initial
                
                for (int i = 1; i <= 400; ++i) {
                        //memory = mf();
                        //System.out.println("Iteration " + i + ":");
                        //System.out.println("\tCurrently used: " + memory + "kb.");
                        //t = System.currentTimeMillis();
                        fa(new BigInteger(i + "")); // Carry the semi-string into the BigInteger-Class (Auto-Cast!)
                        //System.out.println("\tThe calculation took " + (System.currentTimeMillis() - t) + "ms.");
                        //memory = Math.abs(memory - mf());
                        //System.out.println("There was an overhead of " + Math.abs(memory - mf()) + "kb. (" + (Math.abs(memory - mf()) / 1048576) + "mb)");
                }
                
                ff = NumberFormat.getInstance();
                sb = new StringBuilder();
                
                long b = rt.freeMemory() / (2 << 9); //1024
                a -= (b); // Diff @ a => this::26::26-32
                
                System.gc(); System.gc(); System.gc(); System.gc();
                System.gc(); System.gc(); System.gc(); System.gc();
                System.gc(); System.gc(); System.gc(); System.gc();
                System.gc(); System.gc(); System.gc(); System.gc();
                
                sb.append(ff.format(a));
                System.out.print("Quicktest.. ∆ " + sb.toString() + "mb. (" + ff.format(b) + "mb offset-total)\n");
                
                System.out.println("Initializing Hugetest.. <must be all-equal from this point> ! ");
                
                // Bytecode: Allocate memory upon reallocation of control-instances;
                // Redeclaration does actually not reallocate anything.
                
                // TRY IMPLEMENTING AS RECURSIVE;
                // FOR PROPER CALCULATION
                // USE UNIQUE VARIABLE
                // WITH AT LEAST 1 SECOND
                // LATENCY AFTER LAST CALL!
                
                for (int i = 10; i <= 400; i+=100){ // FAILS.
                        rt = rt.getRuntime();
                
                        ff = NumberFormat.getInstance();
                        sb = new StringBuilder();
                
                        f = rt.freeMemory();
                        a = f / 1024;
                
                        System.gc(); System.gc(); System.gc(); System.gc();
                        System.gc(); System.gc(); System.gc(); System.gc();
                        System.gc(); System.gc(); System.gc(); System.gc();
                        System.gc(); System.gc(); System.gc(); System.gc();
                
                        System.out.print("i:"+i+" o:"+ff.format(a) + "mb.");
                
                        sb.append(ff.format(a) + "mb."); // Initial
                        
                        fa(new BigInteger(i + ""));
                        
                        ff = NumberFormat.getInstance();
                        sb = new StringBuilder();

                        b = rt.freeMemory() / (2 << 9); //1024
                        a -= (b); // Diff @ a => this::26::26-32
                        
                        System.gc(); System.gc(); System.gc(); System.gc();
                        System.gc(); System.gc(); System.gc(); System.gc();
                        System.gc(); System.gc(); System.gc(); System.gc();
                        System.gc(); System.gc(); System.gc(); System.gc();

                        sb.append(ff.format(a));
                        System.out.print(" Ommited <" + sb.toString() + ">mb. (" + ff.format(b) + "mb offset-total)\n");
                }
        }
}