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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.