On Fri, Feb 22, 2019 at 2:35 AM Ben Grasset <[email protected]> wrote:
> > On Sat, Feb 16, 2019 at 5:44 PM Benito van der Zander <[email protected]> > wrote > >> it can turn out the enumerators are slower than an old school loop >> > > The trick with enumerators is to never make them classes, and use advanced > records instead, I've found. This way you avoid the heap allocation and the > implicit try/finally. Also make sure you inline the MoveNext and > GetCurrent! > > How do you make a (for in) enumerator with a record? I don't use them for exactly this reason, and they did seem to be another useful language feature that turned out to be poorly implemented by Embarcadero. (Haven't checked with FPC).
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