Doctrine 2.0 is the best one in the market because it is supported by topmost frameworks like Zend framework, Symfony.
It also supports nosql db like mangodb etc...
It has inbuilt cache system which can boost the application.
It is also having Extension support like pagination, query builder etc
Here are some of the bechmarks results of propel and doctrine
| Insert | findPk | complex| hydrate| with |
|--------|--------|--------|--------|--------|
PDOTestSuite | 132 | 149 | 112 | 107 | 109 |
Propel14TestSuite | 953 | 436 | 133 | 270 | 280 |
Propel15aLa14TestSuite | 926 | 428 | 143 | 264 | 282 |
Propel15TestSuite | 923 | 558 | 171 | 356 | 385 |
Propel15WithCacheTestSuite | 932 | 463 | 189 | 342 | 327 |
Doctrine12TestSuite | 1673 | 2661 | 449 | 1710 | 1832 |
Doctrine12WithCacheTestSuite | 1903 | 1179 | 550 | 957 | 722 |
Doctrine2TestSuite | 165 | 426 | 412 | 1048 | 1042 |
Doctrine2WithCacheTestSuite | 176 | 423 | 148 | 606 | 383 |
These are the key observations for the Doctrine 2 results.
see the last two records how the performance has increased with doctrine 2.0...
