Possible Duplicate:
Is Drupal 7 slower than Drupal 6?
I want to start new project and stuck without idea what version to use.
I have huge expirience with D6, and also one project (module developement) for D7. It looks like D7 slower, have bigger memory consumption and also have a lack of documentation by the moment. I don’t need new CCK, Views and other – looks like I’ll coding all features needed as modules.
Is D7 have sweet parts now, or better way is develop project under D6?
What way you choose for yourself, and why?
From the developer or themer point of view however, I love Drupal 7 because, there are quite a few key improvements, such as:
Core support of
translatable Fields without localization helllike in the previous versions (which is helpful both to module and theme developers)Being able to have
vocabularies with fieldsBeing able to give users access to the
nodes list page without having to give full node edition rights(or installing a bunch of additional modules).I liked the eye-candy and technical feat of the overlayed interface, however personally I prefer turning that off: too confusing for regular users and my minimalisation instinct cringes at the sight of overlapping pages.
The only downside to D7 right now is that, depending on your needs, there may be some modules that haven’t migrated yet, but that won’t take long, especially if you make your own modules (which is something you mentionned in the question).