https://github.com/msrocka/olca-benchmarks

A project template for running micro-benchmarks of openLCA core functions.
https://github.com/msrocka/olca-benchmarks

jmh-benchmarks openlca

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A project template for running micro-benchmarks of openLCA core functions.

• Host: GitHub
• URL: https://github.com/msrocka/olca-benchmarks
• Owner: msrocka
• Created: 2018-07-10T14:52:06.000Z (over 6 years ago)
• Default Branch: master
• Last Pushed: 2020-01-18T17:13:42.000Z (almost 5 years ago)
• Last Synced: 2024-06-11T16:21:00.730Z (7 months ago)
• Topics: jmh-benchmarks, openlca
• Language: Java
• Homepage:
• Size: 52.7 KB
• Stars: 1
• Watchers: 3
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# olca-benchmarks

This is a project template for running micro-benchmarks of openLCA core

functions. It uses [jmh](http://openjdk.java.net/projects/code-tools/jmh/) from

the OpenJDK project with a pure Maven setup.

## Usage

Put your benchmark, e.g. `MyBenchmark`, in the `org.openlca.core.benchmark`

package (see also the other examples in this package) and run the following

Maven command:

```bash

mvn clean package exec:java -q -Dbenchmark=MyBenchmark

```

Or execute the `run` script in this project:

```bash

run MyBenchmark

```

## Examples

### Sparse vs. dense matrix-vector functions

Using a plain hash table based implementation in Java for matrix-vector

operations can be much faster than calling into an optimized BLAS library

(OpenBLAS 64bit; tests with an ecoinvent 3.4 system):

```

Benchmark                         Mode  Cnt  Score   Error  Units

SparseMVOps.denseMultiplication   avgt    3  0.210 ± 0.019   s/op

SparseMVOps.denseScaling          avgt    3  0.456 ± 0.224   s/op

SparseMVOps.sparseMultiplication  avgt    3  0.035 ± 0.002   s/op

SparseMVOps.sparseScaling         avgt    3  0.038 ± 0.007   s/op

```

### Field access in table scans

For full table scans it can be much faster to access the fields by index (e.g.

[getLong(int)](https://docs.oracle.com/javase/8/docs/api/java/sql/ResultSet.html#getLong-int-))

instead by name (e.g. [getLong(String)](https://docs.oracle.com/javase/8/docs/api/java/sql/ResultSet.html#getLong-java.lang.String-)).

These are results for the exchange table of [exiobase](https://nexus.openlca.org/database/exiobase):

```

Benchmark                             Mode  Cnt   Score   Error  Units

ExchangeTableScan.scanByFieldNames    avgt    5  40.594 ± 1.532   s/op

ExchangeTableScan.scanByFieldIndices  avgt    5  10.749 ± 0.833   s/op

```