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Werner Van Belle wrote: |
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> Altough it's a nice proposal that would be really usefull, I still think there |
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> are some serious problems involved. Compilation time is non lineair. |
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> Depending on how much cache, how much memory, how fast your hard-disk is, |
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> what your bus-speed is and above all, what the user is doing at the same time |
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> while upgrading his machine will seriously impact compilation time. All of |
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> these factors are very difficult to take into account. |
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I believe gentoo-stats is already sampling a lot of the needed |
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information. An estimate could primarly be based on some "major" |
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factors; perhaps cpu-type and clock frequency. Then, if enough |
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statistics is available for the current architecture, on other settings |
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as well, sucb as -O flags and size of main memory (MAKEOPTS?). A kind of |
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hierarchical estimate... Could perhaps be hard to implement in practice |
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though (?). |
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But I believe there probably is some limited set of factors that could |
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provide a reasonably good estimate. |
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hw |
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