Sudden spike, delta time

Time.deltaTime is the time in seconds it took Unity to complete the last frame; 7.9 or 8.3 or 17 is way way out of whack. When you play your game, what's your FramesPerSecond when this happens and can you show the code for the relevant part where you are doing your calcs

7.9 means that the last frame took about 8 seconds to complete... What toaster are you running this on?

Here's the code

     void Update () {
         isPressed  =  false;
         
        if (Input.Get$$anonymous$$ey($$anonymous$$eyCode.LeftArrow))
         {
             isPressed = true;
             xSpeed -= (SPEED_STEP*Time.deltaTime);
         }
         if (Input.Get$$anonymous$$ey($$anonymous$$eyCode.RightArrow))
         {
             isPressed = true;
             xSpeed += (SPEED_STEP*Time.deltaTime);
         }
 
             if (Input.Get$$anonymous$$eyDown($$anonymous$$eyCode.UpArrow)){
                       // HERE IS THE PROBLE$$anonymous$$
                             print("jump speed : "+(jumpSpeed*Time.deltaTime));
                 ySpeed += (jumpSpeed*Time.deltaTime);
             }
         
         ySpeed -=(gravity*Time.deltaTime);
         
          if ($$anonymous$$athf.Abs(xSpeed)<1&&! isPressed) {
                 xSpeed=0;
          }
         xSpeed *=hFriction;
 
         checkCollisionX();
         checkCollisionY();
     }

This is the code, its basically for a platformer game. the value of SPEED_STEP = 40; jumpSpeed = 500; gravity = 15;

The FPS is between 73-88

I don't see any problems with it, but you could try to put the if (Input.Get$$anonymous$$eyDown($$anonymous$$eyCode.UpArrow)){

 // HERE IS THE PROBLE$$anonymous$$

 print("jump speed : "+(jumpSpeed*Time.deltaTime));

 ySpeed += (jumpSpeed*Time.deltaTime);

 }else if(Input.Get$$anonymous$$eyUp($$anonymous$$eyCode.UpArrow)

 ySpeed -=(gravity*Time.deltaTime);

But I don't think this will solve your problem. Why not use built in colliders and physics?

And for my answer:

     ySpeed -=(gravity*Time.deltaTime);
 
 if(ySpeed > maxValue) //for the positive values
     ySpeed = maxValue;
 else if(ySpeed < $$anonymous$$Value) //for the negative values
     ySpeed = $$anonymous$$Value;
 
     if ($$anonymous$$athf.Abs(xSpeed)<1&&! isPressed) {
     
     xSpeed=0;
     
     }
     
     xSpeed *=hFriction;
      
     checkCollisionX();
     
     checkCollisionY();

There character controller has a problem according to this( http://www.gamasutra.com/blogs/YoannPignole/20131010/202080/The_hobbyist_coder_1_2D_platformer_controller.php ) and I want to give the character cartoony physics so thats why.

What if i use fixed Delta time, will it fix my problem? if so, any consequences ?