How can i stress my phone's CPU programatically?

Question

So i overclocked my phone to 1.664ghz and I know there are apps that test your phone\'s CPU performance and stressers but I would like to make my own someway. What is the be

Answer 1

To compile a regex string:

Pattern p1 = Pattern.compile("a*b"); // a simple regex
// slightly more complex regex: an attempt at validating email addresses
Pattern p2 = Pattern.compile("[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*@(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+(?:[A-Z]{2}|com|org|net|edu|gov|mil|biz|info|mobi|name|aero|asia|jobs|museum)\b");

You need to launch these in background threads:

class RegexThread extends Thread {
   RegexThread() {
      // Create a new, second thread
      super("Regex Thread");
      start(); // Start the thread
   } 

   // This is the entry point for the second thread.
   public void run() {
      while(true) {
        Pattern p = Pattern.compile("[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*@(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+(?:[A-Z]{2}|com|org|net|edu|gov|mil|biz|info|mobi|name|aero|asia|jobs|museum)\b");
      }
   }
}

class CPUStresser {
   public static void main(String args[]) {
      static int NUM_THREADS = 10, RUNNING_TIME = 120; // run 10 threads for 120s
      for(int i = 0; i < NUM_THREADS; ++i) {
         new RegexThread(); // create a new thread
      }
      Thread.sleep(1000 * RUNNING_TIME);
   }
}

(above code appropriated from here)

See how that goes.