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FreeBSD Java™ Project: Performance Comparison

Introduction:

Much has been talked about recently with Sun's decision to release an official port of Java for Linux. This study was done to compare the actual performance of the Blackdown Linux Port with the FreeBSD Port of the JDK™.

Summary:

The Linux port is faster than the FreeBSD port, even when the JITs are taken into account. For graphic intensive applications, all the FreeBSD tests are faster than the Linux, with FreeBSD/TYA being the fastest overall. Comparing the Linux port with the FreeBSD port, each with no JIT running, FreeBSD is faster. We may conclude that, when running on FreeBSD, the JIT design makes the difference in speed.

Testing Methods:

All tests were run on FreeBSD 3.4-RC (Tue Dec 7 09:14:51 EST 1999) on a Dual Pentium 200 SMP machine with 128 Megs RAM. Tests were conducted with Pendragon Software's Caffeine Mark 3.0 software using the "Run all tests locally" option.

Software Versions:

The following is a list of the software used in this test:
FreeBSD JDK 1.1.8
Blackdown's JDK 1.2.2-RC3 (under Linux emulation)
ShuJIT 0.3.13
TYA 1.5

Summary Results

Test 1 Test 2 Test 3 Test 4 Test 5 Average
Linux JDK 1.2.2/no JIT 222 223 224 225 222 223
FreeBSD JDK 1.1.8/no JIT 247 247 247 250 247 246
Linux JDK 1.2.2/standard JIT 539 550 543 544 535 542
FreeBSD JDK 1.1.8/shujit 373 376 369 374 373 373
FreeBSD JDK 1.1.8/TYA 478 477 478 479 483 479

Sample Detailed Results:

Sieve Loop Logic String Float Method Graphics Images Dialog
Linux JDK 1.2.2/no JIT 380 434 433 489 363 337 306 25 40
FreeBSD JDK 1.1.8/no JIT 318 456 434 393 381 381 344 77 37
Linux JDK 1.2.2/standard JIT 1361 2005 3354 872 1161 1802 247 28 40
FreeBSD JDK 1.1.8/shujit 800 1566 2191 588 1010 101 317 79 37
FreeBSD JDK 1.1.8/TYA 712 1467 2352 949 1078 512 357 74 38

Conclusion:

Newer versions of the software used in the tests above been released since this test was conducted. For this reason, these tests will be run again in the near future to see if the newer JITs for FreeBSD alter the results. The same JITs will be used with the Linux JDK to test their effects as well.

Tester:

These tests were conducted by Patrick Gardella patrick@FreeBSD.org in December 1999.