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by RogerL
4451 days ago
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Optimization takes serious amounts of time - it's generally a combinatorial problem. If you are not building for production release, do you want to sit for 5 minutes (or 5 hours for a big system) while the compiler cranks away optimizing code that you are just going to rebuild in 20 minutes anyway? Plus, it just doesn't matter for a lot of production code. Finally, if the code is not in a hot path, it really doesn't matter if it is optimized or not. If you make a block of code 10x faster, but some other loop costs you 50% of the performance time, well, you really gained almost nothing. So, heavy optimization tends to be something that you turn on selectively and judiciously. |
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