3 ms·

Optimization in the Twenty-First Century

• eonil 13y ago
  "But, uh-oh, strings are immutable, so each of these append operations causes the entire multi-megabyte string to be copied." This is only true when the scope is limited to specific languages… I am pretty sure that the author is talking bare or low-level stuffs, but it would be better to mention some language scope…
• sokoloff 13y ago
  The very last point is the best, IMO. Look for ways to add concurrency rather than seeking faster sequential execution.
  • dsego 13y ago
    Easy to say, but hard to do right. Especially if you have shared state between execution contexts. Concurrency adds a whole new level of complexity and is hard to test and debug.
• emn13 13y ago
  I know people often repeat that -Os is often better than -O2 or -O3, and I try this regularly, but I don't think I've every seen a large program for which this was true. Does anyone have an example?