Drupal 7 programming advancements, differences from Drupal 6 upgrade or wait

Question

I was just wondering if there were any changes in the Drupal 7 code that effect server load and speed for large sites.

Also, with 7 nearing beta release, should I wa

Answer 1

Although it has an enhanced object-oriented database API based on PHP Data Objects and other database-specific optimizations; CMS wire is reporting the new version is somewhat slower. Other testers have reported the new version has traded performance for flexibility.

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