Hairy Pixels via fpc-pascal <fpc-pascal@lists.freepascal.org> schrieb am Sa., 11. Jan. 2025, 14:17:
> I was curious, is there any practical limit on the size of a set (32 bits > and 256 values) and why they couldn’t be 64 bit or any other arbitrary > size? The floor seems to be 4 bytes too but why not allow smaller sizes to > save memory? Perhaps just a historical artifact but I was curious. > Set are a minimum of 4 Byte by default cause that's how Delphi does them. Ifets you want smaller sets then use the $PackSets directive as Martin had written. The maximum is also based on what TP and Delphi allow. ISO Pascal for example suggests a maximum of 1024 elements instead, though they define this number to be implementation specific. In the end it's a decision of where to do the cut as at some size the majority of the set will be sparsely populated so it makes more sense to use a dedicated type instead (e.g. a hash set or something like that) that wastes less memory. Regards, Sven >
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