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| author | Linus Torvalds <torvalds@g5.osdl.org> | 2005-12-13 11:39:05 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-12-13 11:39:05 -0800 |
| commit | 0910b444bcd7ea7f437a3ff48e0e3d2495ead22e (patch) | |
| tree | 302f0b5dfef59ff98de24c83ff4e86915b648c55 | |
| parent | 83bab9a4bbf91af93f45233dc288c4d26308e281 (diff) | |
| download | op-kernel-dev-0910b444bcd7ea7f437a3ff48e0e3d2495ead22e.zip op-kernel-dev-0910b444bcd7ea7f437a3ff48e0e3d2495ead22e.tar.gz | |
Expose "Optimize for size" option for everybody
Let's put my money where my mouth is. Smaller code is almost always
faster, if only because a single I$ miss ends up leaving a lot of cycles
to make up for. And system software - kernels in particular - are known
for taking more cache misses than most other kinds.
On my random config, this made the kernel about 10% smaller, and lmbench
seems to say that it's pretty uniformly faster too. Your milage may vary.
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| -rw-r--r-- | init/Kconfig | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/init/Kconfig b/init/Kconfig index 5934461..be74adb 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -339,7 +339,7 @@ config EPOLL support for epoll family of system calls. config CC_OPTIMIZE_FOR_SIZE - bool "Optimize for size" if EMBEDDED + bool "Optimize for size" default y if ARM || H8300 help Enabling this option will pass "-Os" instead of "-O2" to gcc |
