There are two tags, and that by present tag wiki are essentially duplicates:

  • Questions about optimizing code for faster results, or how to do faster computations.

  • Questions on optimizing Mathematica code for higher performance. This may mean faster execution, lower memory usage, or both. Use mathematical-optimization instead for minimization/maximization of objective functions.

I realize that covers more than speed alone. Perhaps every question with that tag should be co-tagged with either or . (Or some other performance aspect.) If this is what you prefer post it as an answer please. For my proposal see my own answer.

2 Answers 2


Co-tagging with speed or memory is what I would suggest.

I think is borderline micro-tagging, which will quickly become impractical (we're starting to have way too many micro tags). More importantly, the tag will not be allowed by the system since it is 29 characters in length. The max allowed is 25.

  • And do you think that speed and memory should be used exclusively with PT? If so, this needs explicit stating in their wikis and, more importantly, a lot of weeding as newcomers rarely read wikis. Sep 28, 2013 at 9:25
  • @IstvánZachar No, I believe they can be used by themselves as well. For instance, a question like "Why does this leak memory" would not require PT. I can't think of an example right now for speed, but Mr.Wizard's first sentence seems like a good idea for speed without PT...
    – rm -rf Mod
    Sep 28, 2013 at 14:54

I propose redefining to be used for questions about the speed of existing Mathematica functions, rather than about performance tuning. This is how I have subconsciously using the tag. A question could still be co-tagged with both, but rather than the implication of performance-tuning-for-speed it would mean that the question was about both the specific performance of Mathematica internal functions, and how to optimize code.

Arguably it would be more descriptive and broad to use something like or instead of but it doesn't seem better in practice. Please comment with thoughts on this matter.

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