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| Re: An Interesting Processor Comparison |
| October 10th, 2009 at 4:33 AM |
|
Aha. Figured out why the AthlonXP beats the pants off the Core Duo. Too many processes. The Core Duo seems to be much slower at creating new processes, which my test method did a lot of. Also, with the fact that so many short-lived processes are flying around, and therefore being shuttled back and forth between the two cores, these cores' caches probably aren't being used very well, causing even more slowdown. In the end, I rewrote my processing shell scripts as one program (a PHP script :P), and the processing time on the Core Duo went from 20 minutes down to a few seconds. Clearly, the new-process overhead is significant. The other machines saw similar improvements, to the point where I can't really tell which machine is fastest, because the script runs so fast. |
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