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Le 12/02/2016 16:46, dick balaska a écrit :
> 
> [1] I have scenes where the i7 is only 20% faster than the i5. I
> have other scenes where the i7 is 10x faster(!) than the i5. (I
> don't know if that is a Windows (i7) vs. Linux (i5) issue.)

My measures with i7 and povray (Linux): the HT-core is worth only 20
to 25% percent of a real core. At least for benchmark scene.

The compiler also play a significant role, and the intensive memory
access of a scene might too (if you are lucking enough for your parsed
scene to fit in the L3 cache of the CPU, big win): remember, despite
the number of cores, there is only one bus to reach the RAM.

http://wiki.povray.org/content/User:Le_Forgeron/vault/Compilation


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