What is Set size of large pages: -XX:+OptimizeStringConcat?

Usage:

You can tell the JVM to optimize concat operations with the following:

-XX:+OptimizeStringConcat

Description:

This flag allows the JVM to optimize the use of StringBuilder instances – in particular those StringBuilders which are created by the compiler when we use the concat operation like:

String concatted = “a “ + “concat”;

The javac compiler translates this into a number of append operations on a StringBuilder object. When we enable the OptimizeStringConcat flag, the JIT compiler will optimize the creation of StringBuilder by itself.

Default Value:

Default is false until 7u4, where it’s enabled by default.

Errors:

None

Arguments related:

None

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NOTE:

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