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At Wed, 24 May 2006 20:52:21 +0000 Alex <sohalt@×××××.com> wrote: |
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> Hi, |
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> |
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> znx wrote: |
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>> http://gentoo-wiki.com/TIP_Free_up_disk_space_in_Gentoo |
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> |
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> > Using CFLAGS="-Os" or CFLAGS="-O2" is much more effective on |
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> > a desktop system and can shave off more than 30% of the size. This is |
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> > because larger binaries (like the HUGE ones produced by -O3) |
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> > take longer to load, and occupy more RAM. |
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> |
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> Is that always true? I mean, I'm not loading and unloading |
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> applications the whole time. Additionally I've enough RAM for all |
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> applications I use and so I can't imagine that (on my computer with my |
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> use) applications, which are slower and smaller, can be faster than |
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> applications which are bigger and faster. |
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Often the bigger problem with large binaries is that their working |
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sets exceeds the sizes of the L1 and (possibly) L2 caches. So, you |
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may well be right that your gigabytes of RAM greatly reduce disk |
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access to load and demand page applications, you may still get a |
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slowdown due to cache misses. Central memory, which is the fast & |
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small storage when considering demand paging, is the large but slow |
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storage when considering caching. |
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|
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allan |
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|
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-- |
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