Packages

class CsvBench extends AnyRef

Measures the time to parse a 1 MB CSV file, consuming the first field of each row.

Using Oracle Flight Recorder

To record a Flight Recorder file from a JMH run, run it using the jmh.extras.JFR profiler: > csv-bench/jmh:run -prof jmh.extras.JFR -t1 -f1 -wi 5 -i 10 .*CsvBench

This will result in flight recording file which you can open and analyze offline using JMC. Start with "jmc" from a terminal.

Sample benchmark results

Your results may differ. Rerun these on YOUR OWN MACHINE before/after making changes.

> csv-bench/jmh:run -t1 -f1 -wi 10 -i 10 .*CsvBench
[info] Benchmark        (bsSize)   Mode  Cnt    Score   Error  Units
[info] CsvBench.parse        32  thrpt   10   78.424 ± 1.351  ops/s
[info] CsvBench.parse      1024  thrpt   10  158.948 ± 3.187  ops/s
[info] CsvBench.parse      8192  thrpt   10  167.617 ± 2.759  ops/s
[info] CsvBench.parse     65536  thrpt   10  170.670 ± 2.462  ops/s
Annotations
@Warmup() @Measurement() @BenchmarkMode() @Fork() @State()
Source
CsvBench.scala
See also

https://github.com/ktoso/sbt-jmh

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  1. new CsvBench()

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  1. final def !=(arg0: Any): Boolean
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  4. final def asInstanceOf[T0]: T0
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  5. var bsSize: Int

    Size of ByteString chunks in bytes.

    Size of ByteString chunks in bytes.

    Total message size remains the same. This just determines how big the chunks are.

    WSClient returns a Source[ByteString, _] in 8k chunks.

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  16. final def notifyAll(): Unit
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  17. def parse(bh: Blackhole): Unit
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    @Benchmark()
  18. def setup(): Unit
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    @Setup()
  19. var source: Source[ByteString, NotUsed]
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    (Since version ) see corresponding Javadoc for more information.

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