Am Donnerstag, den 21.03.2013, 16:38 -0600 schrieb Luis Carlos: > Hi: Hi, yet another small response, neglecting all non-CPU parts of a computer...
> I will buy a Linux Laptop (system76) and I've got three different > options for the processor. Speeding up Darktable exporting process is > my main reason to change my laptop :-) > > > These are the options: > > > Core i7-3630QM Processor ( 2.40GHz 6MB L3 Cache - 4 Cores plus > Hyperthreading ) > Core i7-3740QM Processor ( 2.70GHz 6MB L3 Cache - 4 Cores plus > Hyperthreading ) ( + $175.00 ) > Core i7-3840QM Processor ( 2.80GHz 8MB L3 Cache - 4 Cores plus > Hyperthreading ) ( + $369.00 ) My wild guess, based on experience with any CPU intensive work, is: The 300MHz / 175$ is wasted clock-per-cash, since you can expect a 12,5% performance increase at the very very very unrealistic best. The real speedup is probably below 1%. The larger cache of the big one could really make a notable difference. The faster speed is only a nice extra. Even the slowest cache on the CPU (L3) can be accessed so much faster than RAM (roughly factor 10, I think), that CPUs tend to be waiting for "ages" for new data to arrive. Modern CPUs already have fancy prediction algorithms, though, to read data from RAM long before it might actually be needed. Larger caches simply increase the probability that the next required bunch of data is already pre-cached, so they can be accessed much faster. If you are in the position that 369$ wouldn't bother you much longer than a month (I'm not...), I would recommend the 3840QM. I would never-ever go for the 3740QM. > Thanks in advance for any advice! Have fun with your new monster. :-) ------------------------------------------------------------------------------ Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_d2d_mar _______________________________________________ Darktable-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/darktable-users
