Android : Android Sqlite Performance

I have been doing some experiments to measure sqlite performance on android. I was disappointed a little bit with the results. What i did was inserting 10.000 queries to table and it took 130-140 seconds but with these conditions;

1. Samsung galaxy s3 in power saving mode

2. Inserted data(or class)has 3 strings and one float(real for sqlite)

3. Insert event is being done in asynctask.

4. In asynctask, i am showing a progress dialog with passed timer text in it (System.currentTimeMillis - seconds etc blala)

class AddStudentsTask extends AsyncTask<Void,Integer,Void>
{
    ProgressDialog prgDialog;
    int max = 10000;
    Student s;
    long seconds = System.currentTimeMillis();


    @Override
    protected void onPreExecute() {
        super.onPreExecute();
        prgDialog = new ProgressDialog(MainActivity.this);
        prgDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
        prgDialog.setMessage(seconds+"");
        prgDialog.setMax(max);
        prgDialog.setCancelable(false);
        prgDialog.show();

    }

    @Override
    protected void onProgressUpdate(Integer... values) {
        super.onProgressUpdate();
        prgDialog.setProgress(values[0]);
        sList.add(s);
        String s = (System.currentTimeMillis()-seconds)/100+"";
        if(s.length()>2)
            s = s.substring(0,s.length()-1) + "." + s.charAt(s.length()-1);
        else if(s.length() == 2)
            s = s.charAt(0) + "." + s.charAt(1);
        prgDialog.setMessage(s + " seconds passed.");

    }

    @Override
    protected Void doInBackground(Void... voids) {

        for(int a = 0;a< max; a++ )
        {
            Random r = new Random();
            s = new Student();

            s.setGpa(r.nextFloat()*4);
            s.setLastName("asdasd");
            s.setFirstName("Oh My Fuckig God");
            s.setAddress("1sadasd");
            s.setId(sda.insert(s));
            publishProgress(a);
        }

        return null;
    }

    @Override
    protected void onPostExecute(Void aVoid) {
        super.onPostExecute(aVoid);
        prgDialog.dismiss();
        sa.notifyDataSetChanged();
    }
}

5. I am using contentValues with insertOrThrow method in helperdb class. THIS IS OLD SLOW CODE

public long insert(Student s)
{
    SQLiteDatabase db = sh.getWritableDatabase();
    ContentValues cv = new ContentValues();
    cv.put(StudentHelper.FIRSTNAME,s.getFirstName());
    cv.put(StudentHelper.LASTNAME,s.getLastName());
    cv.put(StudentHelper.ADDRESS,s.getAddress());
    cv.put(StudentHelper.GPA,s.getGpa());
    s.setId(db.insertOrThrow(StudentHelper.TABLE_NAME, null, cv));
    return s.getId();
}

6. This task is done in onCreate method of activity.

So what am i doing wrong here or expecting too much from it? Are these results ok or bad?

What can i do to improve my code?

EDIT

So i changed my insert code to this and it speeded up 20 times faster!!!

String sql = "INSERT INTO "+StudentHelper.TABLE_NAME+"" +
            "("+StudentHelper.FIRSTNAME+","+StudentHelper.LASTNAME+"," +
            " "+StudentHelper.GPA+") values(?,?,?)";
    SQLiteDatabase db = sh.getWritableDatabase();
    db.beginTransaction();
    SQLiteStatement stmt = db.compileStatement(sql);

    stmt.bindString(1,s.getFirstName());
    stmt.bindString(2,s.getLastName());
    stmt.bindDouble(3,s.getGpa());

    s.setId(stmt.executeInsert());
    stmt.clearBindings();

    return s.getId();