IBM User Guide for Java V7 on Windows > Reference > Command-line options > JIT and AOT command-line options

-Xcodecache

This option is used to tune performance.

-Xcodecache<size>

This option sets the size of each block of memory that is allocated to store the native code of compiled Java™ methods. By default, this size is selected internally according to the processor architecture and the capability of your system. If profiling tools show significant costs in trampolines, that is a good reason to change the size until the costs are reduced. Changing the size does not mean always increasing the size. The option provides the mechanism to tune for the correct size until hot interblock calls are eliminated. A reasonable starting point to tune for the optimal size is (totalNumberByteOfCompiledMethods * 1.1).

Note: Trampolines are where reflection is used to avoid inner classes.

Parent: JIT and AOT command-line options

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