An attack question

What is the exact movement debuff when attacking?

I've read somewhere that while attacking, you run with the same speed that you do while walking backwards (holding "S" by default).

Not an exact number but thanks :D

Walking backwards decreases your movement speed by half, as in 50%. Thought everyone knew this already haha. :p

oh really did not know this, thanks =D

and whach is speed strafing left - right (A D) and moving diagonans (WA SD wor example)?

You move at 100% movement speed while moving forward and casting some spells.
You move at 50% movement speed while moving forward and attacking.
You move at 50% movement speed while moving backwards.
You move at roughly 75% movement speed while moving forward and sidewards at the same time.
You move at 50% movement speed when moving backwards while attacking at the same time.
You move at roughly 75% movement speed while moving sidewards.
You move at 50% movement speed while moving backwards and sidewards at the same time.