Warning

You're browsing the old v2.x documentation. This version is no longer maintained. Click here to go the v3.x documentation.

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revisionPrevious revision
Last revisionBoth sides next revision
performance [2019/08/05 11:47] – [Tip #8 REPEAT ... UNTIL is faster than FOR ... NEXT] neilsperformance [2019/09/03 08:55] – [Tip #9: Know the optimizer] neils
Line 98: Line 98:
   until i! = 100   until i! = 100
      
-==== Tip #9: Know the optimizer ====+==== Tip #9: Use LSHIFT() and RSHIFT() ==== 
 + 
 +It's much faster to multiply or divide by powers of two using bit shifting operations. Use [[lshift|LSHIFT()]] and [[rshift|RSHIFT()]] whenever you can. 
 + 
 +==== Tip #10: Know the optimizer ====
  
 **XC=BASIC** features a built-in optimizer that replaces commonly used program sequences with faster opcode sequences. To make good use of the optimizer, bear in mind the following program structures that can be optimized: **XC=BASIC** features a built-in optimizer that replaces commonly used program sequences with faster opcode sequences. To make good use of the optimizer, bear in mind the following program structures that can be optimized: