Thin on JRuby
After much work from Wayne Meissner and myself I have managed to get the Thin webserver running on JRuby. It actually loaded for a couple of weeks or so already, but only recently stopped crashing when receiving a request. Today I have managed to get it to serve pages as well, so I guess it’s time for some speed checking :)
The tests are just quickly done using ab and were run on REE 2010.02, JRuby Head on the cext branch and Rubinius 1.0.0-20100514. I did 1000 requests at different concurrency levels and checked the average req/s.
The numbers
| concurrency | REE | JRuby | Rubinius |
| 1 | 3102 | 298 | 214 |
| 11 | 3563 | 521 | 544 |
| 21 | 4836 | 584 | 754 |
| 31 | 3402 | 668 | 728 |
| 41 | 5056 | 686 | 486 |
| 51 | 4025 | 672 | 797 |
| 61 | 5427 | 1046 | 704 |
| 71 | 3874 | 1080 | 736 |
| 81 | 5249 | 947 | 685 |
| 91 | 3919 | 678 | 579 |
As we can see, JRuby starts something like 15x slower than REE
and only recovers to about 4 times slower with a concurrency of 71. It
is generally faster than Rubinius, though. This is not a fair
comparison, though, as JRuby has a Java implementation of
EventMachine.
Apart from that, overall coverage of the C API specs is getting better, too. Currently out of the 348 examples, 26 fail and 110 throw errors. Failures are mostly incomplete implementations of Ruby functions, errors are almost exclusively missing functions.