The option text has now also been changed to "If unsure, say N"[1] with the following rationale:
| Sadly, -Os keeps on generating some very suboptimal code for certain | cases, to the point where any I$ miss upside is swamped by the downside. | The main ones are: | | - using "rep movsb" for memcpy, even on CPU's where that is | horrendously bad for performance. | | - not honoring branch prediction information, so any I$ footprint you | win from smaller code, you lose from less code density in the I$. | | - using divide instructions when that is very expensive. [1]: http://git.kernel.org/linus/3a55fb0d9fe8e2f4594329edd58c5fd6f35a99dd -- Romain Francoise <rfranco...@debian.org> http://people.debian.org/~rfrancoise/ -- To UNSUBSCRIBE, email to debian-kernel-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/87sj60e0ay....@silenus.orebokech.com
