[MINOR] Append perf

This commit adds a perf script for MCSR appending.
It is manly ment as an example of how to execute a perf script.

````
Me:~/github/systemds$ java -jar target/systemds-3.3.0-SNAPSHOT-perf.jar 1004 1000 100000
Appending rep: 1000 of 100000 distinct append calls (including random and allocations)
Append all dense:             4.262+-  0.164 ms
Append all zero on empty:     0.198+-  0.004 ms
Append all zero on Scalar:    0.197+-  0.004 ms
Append all zero on Array:     0.203+-  0.013 ms
Append half zero on Array:    4.422+-  0.170 ms
```

Closes #2011
6 files changed
tree: a35c28e3eac0408fddb9d9a71992d7fcf4365cad
  1. .github/
  2. .mvn/
  3. bin/
  4. conf/
  5. dev/
  6. docker/
  7. docs/
  8. scripts/
  9. src/
  10. .asf.yaml
  11. .gitattributes
  12. .gitignore
  13. .gitmodules
  14. CITATION
  15. CONTRIBUTING.md
  16. doap.rdf
  17. LICENSE
  18. NOTICE
  19. pom.xml
  20. README.md
README.md

Apache SystemDS

Overview: SystemDS is an open source ML system for the end-to-end data science lifecycle from data integration, cleaning, and feature engineering, over efficient, local and distributed ML model training, to deployment and serving. To this end, we aim to provide a stack of declarative languages with R-like syntax for (1) the different tasks of the data-science lifecycle, and (2) users with different expertise. These high-level scripts are compiled into hybrid execution plans of local, in-memory CPU and GPU operations, as well as distributed operations on Apache Spark. In contrast to existing systems - that either provide homogeneous tensors or 2D Datasets - and in order to serve the entire data science lifecycle, the underlying data model are DataTensors, i.e., tensors (multi-dimensional arrays) whose first dimension may have a heterogeneous and nested schema.

ResourceLinks
Quick StartInstall, Quick Start and Hello World
Documentation:SystemDS Documentation
Python DocumentationPython SystemDS Documentation
Issue TrackerJira Dashboard

Status and Build: SystemDS is renamed from SystemML which is an Apache Top Level Project. To build from source visit SystemDS Install from source

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