org.apache.calcite.benchmarks

Class StringConstructBenchmark

java.lang.Object

org.apache.calcite.benchmarks.StringConstructBenchmark

public class StringConstructBenchmark
extends Object

A benchmark of the most common patterns that are used to construct gradually String objects.

The benchmark emphasizes on the build patterns that appear in the Calcite project.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	StringConstructBenchmark.AppenderState A state holding an Appendable object which is initialized after a fixed number of append operations.
static class	StringConstructBenchmark.WriterState A state holding a Writer object which is initialized only once at the beginning of the benchmark.

Constructor Summary

Constructors

Constructor and Description
StringConstructBenchmark()

Method Summary

Modifier and Type	Method and Description
void	appendString(org.openjdk.jmh.infra.Blackhole bh, StringConstructBenchmark.AppenderState appenderState) Benchmarks the performance of instantiating different Appendable objects and appending the same string a fixed number of times.
PrintWriter	initPrintWriter(StringConstructBenchmark.WriterState writerState)
StringBuilder	initStringBuilder()
StringWriter	initStringWriter()
static void	main(String[] args)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

StringConstructBenchmark

public StringConstructBenchmark()

Method Detail

initStringBuilder

public StringBuilder initStringBuilder()

initStringWriter

public StringWriter initStringWriter()

initPrintWriter

public PrintWriter initPrintWriter(StringConstructBenchmark.WriterState writerState)

appendString

public void appendString(org.openjdk.jmh.infra.Blackhole bh,
                         StringConstructBenchmark.AppenderState appenderState)
                  throws IOException

Benchmarks the performance of instantiating different Appendable objects and appending the same string a fixed number of times.

Parameters:

bh - blackhole used as an optimization fence

appenderState - the state holds the type of the appender and the number of appends that need to be performed before resetting the appender

Throws:

IOException - if the append operation encounters an I/O problem

main

public static void main(String[] args)
                 throws org.openjdk.jmh.runner.RunnerException

Throws:

org.openjdk.jmh.runner.RunnerException