Re: -O2 vs -O3

From: Christopher Thompson (chris@hypocrite.org)
Date: Thu May 25 2000 - 14:39:21 EDT

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    Disclaimer: Probably off-topic now.

    On Thu, 25 May 2000, you wrote:
    > Then I could compile some stats for the kernel compiled with different
    > options (-O2, -06, -Os, and perhaps there are other useful options to
    > test with?)

    Here are some stats just from compiling the kernel. Please note that I did
    *not* try booting any of these kernels so they might not actually work:

    quoted time is user time on an unloaded system, compiling 2.3.99-pre8

    -O0: fails compile
    -O1: 7 min 22 s --> 807594 bytes
    -O2: 8 min 38 s --> 830397 bytes
    -O3: 8 min 55 s --> 869151 bytes
    -Os: 8 min 36 s --> 819874 bytes 

    -- 
Christopher Thompson  http://hypocrite.org/
         "Flawed, weak, organic."

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