ExperimentalHashLib

ExperimentalHashMapLib is an experimental HashMap implementation for Sysmac. This was created to confirm issues when implementing associative arrays. It is a functional implementation of HashMap, as it cannot be extended linguistically. This implementation has performance issues that limit its use. It also lacks memory management, so deleting a value will not reuse that space. For details, please check this article (Japanese). The performance is as follows:

Operation	Minimum(us)	Maximum(us)	Average(us)
Get	30	41	34
Put	66	86	72
Update	82	106	91
Delete	84	105	91

Performance with NX102-9000 Ver 1.64 (n=64, key=33 bytes)

Built environment

This project was built and performance verified in the following environment:

Controller	NX102-9000 Ver 1.64
Sysmac Studio	Ver.1.61

How to use "ExperimentalHashMapLib.smc2"

1. git clone this repository or download the zip.
2. Open "ExperimentalHashMapLib.smc2" in Sysmac Studio.
3. Reference "lib/MurmurHash3Lib.slr" as a library.
4. Reference "lib/STUnitLib.slr" as a library.
5. Check "POU/Program/README".
6. Match the controller settings to your running environment.
7. Build the project.
8. Run on the simulator or on the actual machine.

File hash

I recommend checking the hash value of the acquired Sysmac Studio project.

file	sha256
ExperimentalHashMapLib.scm2	20456bd6496db0abb4b4b6f4935d1aad62b520cff6d08bb3fc5e601c0207da00