Java On Raspberry Pi Performance
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My objective is to performance test basic JVM functions of different JVMs on the Raspberry Pi hardware to see which JVM is fastest overall. For this I have created a few different tests that exercise specific operations, such as floating-point math, file IO, etc. The results are not relevant compared to other hardware. The results metrics are really not important either other than as they compare to the same test on a different JVM. | My objective is to performance test basic JVM functions of different JVMs on the Raspberry Pi hardware to see which JVM is fastest overall. For this I have created a few different tests that exercise specific operations, such as floating-point math, file IO, etc. The results are not relevant compared to other hardware. The results metrics are really not important either other than as they compare to the same test on a different JVM. | ||
Revision as of 00:00, 6 December 2012
My objective is to performance test basic JVM functions of different JVMs on the Raspberry Pi hardware to see which JVM is fastest overall. For this I have created a few different tests that exercise specific operations, such as floating-point math, file IO, etc. The results are not relevant compared to other hardware. The results metrics are really not important either other than as they compare to the same test on a different JVM.
Contents |
VMs Tested
There's currently a few different JVMs available for Raspberry Pi. I tested these:
java version "1.7.0_06" Java(TM) SE Embedded Runtime Environment (build 1.7.0_06-b24, headless) Java HotSpot(TM) Embedded Client VM (build 23.2-b09, mixed mode)
java version "1.7.0_03" OpenJDK Runtime Environment (IcedTea7 2.1.3) (7u3-2.1.3-1) OpenJDK Zero VM (build 22.0-b10, mixed mode)
java version "1.7.0_03" IcedTea Runtime Environment (IcedTea7 2.1.3) (7u3-2.1.3-1) CACAO (build 1.1.0pre2, compiled mode)
java version "1.7.0_03" OpenJDK Runtime Environment (IcedTea7 2.1.3) (7u3-2.1.3-1) JamVM (build 1.6.0-devel, inline-threaded interpreter with stack-caching)
- The control was a MacBook Pro OSX Darwin Kernel Version 10.8.0
- 2.4 GHz Intel Core 2 Duo
- All tests we run with -d32 to force 32-bit mode
java version "1.6.0_37" Java(TM) SE Runtime Environment (build 1.6.0_37-b06-434-10M3909) Java HotSpot(TM) 64-Bit Server VM (build 20.12-b01-434, mixed mode)
Results Summary
- Oracle's VM was the fastest in the most categories. Unfortunately they're not providing a JDK yet with a compiler.
- Jam VM looks promising for startup speed
- Zero was the slowest in most categories, but it's also the only OpenJDK VM that appears to be complete
- Zero and Jamm were significantly slower in numerical calculations than the other 2
- IO performance was the most dramatic win for the Oracle VM. IO is so much slower on the all the OpenJDK VMs that seriously impacts Resin performance
- There was no clear best choice after these tests because Oracle doesn't provide a compiler, Zero is so slow, and the other 2 VMs are incomplete.
- I am going to further test Cacao to see how Resin runs since this is OpenJDK VM appears to offer the best overall performance