Rails 3 70% slower than Rails 2.3.5?

rubyonrails-talk
1

I have finished converting my live apps to Rails 3.

I am using Ruby Enterprise 1.8.7 and Passenger 2.2.15

I go from 5.31 trans/sec to 3.05 trans/sec per AWS EC2 instance.

$ siege -c 5 -t 1M http://localhost

RAILS 2.3.5 RESULTS Transactions: 320 hits Availability: 100.00 % Elapsed time: 60.26 secs Data transferred: 6.76 MB Response time: 0.45 secs Transaction rate: 5.31 trans/sec Throughput: 0.11 MB/sec Concurrency: 2.41 Successful transactions: 320 Failed transactions: 0 Longest transaction: 1.05 Shortest transaction: 0.25

RAILS 3 Transactions: 169 hits Availability: 100.00 % Elapsed time: 55.38 secs Data transferred: 3.72 MB Response time: 1.06 secs Transaction rate: 3.05 trans/sec Throughput: 0.07 MB/sec Concurrency: 3.23 Successful transactions: 169 Failed transactions: 0 Longest transaction: 1.74 Shortest transaction: 0.58

This is my passenger settings PassengerRoot /opt/ruby-1.8.7/lib/ruby/gems/1.8/gems/passenger-2.2.15 PassengerRuby /opt/ruby-1.8.7/bin/ruby PassengerMaxPoolSize 6 PassengerUseGlobalQueue on PassengerHighPerformance on

2

Everything else aside, isn’t going from 5.31 to 3.05 trans/sec 43% slower?

Fred

3

I removed Passenger from the equation, and let this be script/server -e production (Rails 2.3.5) vs. rails server -e production (Rails 3).

The difference is even greater.

BTW. I am on Ubuntu 10.4.

RAILS 2.3.5 Transactions: 109 hits Availability: 100.00 % Elapsed time: 59.77 secs Data transferred: 23.80 MB Response time: 2.20 secs Transaction rate: 1.82 trans/sec Throughput: 0.40 MB/sec Concurrency: 4.01 Successful transactions: 109 Failed transactions: 0 Longest transaction: 2.99 Shortest transaction: 0.53

RAILS 3 Transactions: 312 hits Availability: 100.00 % Elapsed time: 60.32 secs Data transferred: 68.81 MB Response time: 0.44 secs Transaction rate: 5.17 trans/sec Throughput: 1.14 MB/sec Concurrency: 2.29 Successful transactions: 312 Failed transactions: 0 Longest transaction: 0.99 Shortest transaction: 0.10

4

Sharkie Landshark wrote:

I removed Passenger from the equation, and let this be script/server -e production (Rails 2.3.5) vs. rails server -e production (Rails 3).

The difference is even greater.

But in the other direction. Look at your figures again: you're getting 1.82 trans/sec with 2.3.5 and 5.17 trans/sec with 3.

Best,

5

I seriously apologize: I mislabeled my second results.

Rails 2.3.5 is much faster than Rails 3

One other difference is that Rails 2.3.5 is running on Ruby Enterprise 1.8.6 and Rails 3 is running on Ruby Enterprise 1.8.7 both on Ubuntu.

RAILS 2.3.5 Transactions: 312 hits Availability: 100.00 % Elapsed time: 60.32 secs Data transferred: 68.81 MB Response time: 0.44 secs Transaction rate: 5.17 trans/sec Throughput: 1.14 MB/sec Concurrency: 2.29 Successful transactions: 312 Failed transactions: 0 Longest transaction: 0.99 Shortest transaction: 0.10

RAILS 3 Transactions: 109 hits Availability: 100.00 % Elapsed time: 59.77 secs Data transferred: 23.80 MB Response time: 2.20 secs Transaction rate: 1.82 trans/sec Throughput: 0.40 MB/sec Concurrency: 4.01 Successful transactions: 109 Failed transactions: 0 Longest transaction: 2.99 Shortest transaction: 0.53

6

The problem could be with ActiveRecord performance.

Rails 2.3.5

puts Benchmark.measure{5000.times{User.find :first, :conditions => ["id = ?", (rand * 1000 + 1).to_i]}}   1.500000 0.100000 1.600000 ( 2.371361)

Rails 3.0

puts Benchmark.measure{5000.times{User.find :first, :conditions => ["id = ?", (rand * 1000 + 1).to_i]}}   8.160000 0.160000 8.320000 ( 15.330955)

Is this a known problem?

7

I can also reproduce this problem on my Macbook Pro using Snow Leopard 10.6.4

Rails 2.3.5 puts Benchmark.measure{5000.times{User.find :first, :conditions => ["id = ?", (rand * 1000 + 1).to_i]}}   2.460000 0.440000 2.900000 ( 20.093052)

Rails 3.0 puts Benchmark.measure{5000.times{User.find :first, :conditions => ["id = ?", (rand * 1000 + 1).to_i]}}   9.100000 0.810000 9.910000 ( 28.481634)