I always thought of Intel Core i7 as the best and the fastest compared to Intel Core i5. That is why when I saw computer specifications with Core i7 processor looks wow compared to Core i5 and sometimes it become justifiable for a more expensive price. Few moments ago I conclude that this is not a right opinion. The number of core and clockspeed have more impact on performance compared to processor series or architectures.
Up until yesterday I still think that the more modules you install on Drupal, the slower the website will be. And I was wrong (doh!). After I install various modules to enhance website functionality, I try to measure its performance using my regular tools, YSlow and PageSpeed. With 17 modules installed (listed here) I found that the performance is still pretty good.
YSlow Grade: B, Score: 86
PageSpeed Score: 94