Messages in this thread | | | Subject | Re: Compiling 2.2.19 with -O3 flag | Date | Fri, 24 May 2002 15:42:26 +0100 (BST) | From | Alan Cox <> |
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> I would like to ask when compiling with -O3 flag on a > kernel such as 2.2.19, what harm / side effect will I > feel later on if any? will i loose speed in other area's?
Bench it and see. From my own experience -O3 made the kernel a lot larger and reduced overall performance - in part because the kernel already explicitly figures out what it wants inlined.
Interestingly enough -Os outperformed -O2 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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