Symfony – PHP+APC, 150 concurrent users
results
Transactions: 14363 hits
Availability: 98.68 %
Elapsed time: 183.12 secs
Data transferred: 3.72 MB
Response time: 1.34 secs
Transaction rate: 78.43 trans/sec
Throughput: 0.02 MB/sec
Concurrency: 105.06
Successful transactions: 122
Failed transactions: 192
Longest transaction: 30.67
Shortest transaction: 0.02

Rails – 10 mongrels, 150 concurrent users
results
Transactions: 14718 hits
Availability: 100.00 %
Elapsed time: 180.61 secs
Data transferred: 20.22 MB
Response time: 1.79 secs
Transaction rate: 81.49 trans/sec
Throughput: 0.11 MB/sec
Concurrency: 146.12
Successful transactions: 14718
Failed transactions: 0
Longest transaction: 18.39
Shortest transaction: 0.00

Django, 150 concurrent users
results
Transactions: 19903 hits
Availability: 100.00 %
Elapsed time: 180.78 secs
Data transferred: 26.73 MB
Response time: 1.35 secs
Transaction rate: 110.10 trans/sec
Throughput: 0.15 MB/sec
Concurrency: 148.32
Successful transactions: 19903
Failed transactions: 0
Longest transaction: 20.03
Shortest transaction: 0.01

Summary
Rails performed much better than Symfony. And Django performed much better than Rails.