What Simple Changes Made the Biggest Improvements to Your Delphi Programs [closed]

Answer 1

• BeginUpdate ... EndUpdate
• ShortString vs. String
• Use arrays instead of TStrings and TList

But the sad answer is that tuning and optimization will give you maybe 10% improvement (and it's dangerous); re-design can give you 90%. Once you really understand the goal, you often can restate the problem (and therefore the solution) in much better terms.

Cheers