How to run OptalCP benchmark

Requirements

OptalCP (https:///optalcp.com)
NodeJS (https://nodejs.org) or bun (https://bun.sh/)

Instructions

jobshop.mjs

The file jobshop.mjs contains all what is needed for the benchmark

CP-SAT model for the (reentrant) jobshop problem
loop that reads the instances in json format
solution validation
generation of results.json and solutions.json files

The parameters to be adjusted are

const params = {  
    // Default parameters are usually fine, but if you want to change some parameters
    // You shouldn't need to change any other parameters than these
    timeLimit: 600,
    logLevel: 0,
    //preset : "Default", // "Large" 
    //lnsMode : "Robust", // "Focused"
    noOverlapPropagationLevel : 4, 
    cumulPropagationLevel: 3,
    integralPropagationLevel : 2,
    positionPropagationLevel : 2,
    reservoirPropagationLevel: 2,
    usePrecedenceEnergy : 1, 
    //fdsDualStrategy : "Split", // "Minimum", "Random"
    //workers: [{ searchType  : "LNS"}, { searchType  : "LNS"}, { searchType  : "LNS"}, { searchType  : "FDSDual" }] 
}

and the filters which controls what instances are ran (from bks.json)

const filter = {
    family : new Set(["dmu", "ta"]),
}

Runs all the instances from families dmu and ta

const filter = {
    status : new Set(["open"])
}

Runs all the instances marked “open” in bks.json

The file can be run with the command

node jobshop.mjs

results.json

The benchmark script creates a file results_OptalCP_{date} and for each problem solved an entry of the form

{
    "instance" : "abz5",
    "lb" : {
        "value":1234,
        "date":"2026-06-21",
        "solver":"OptalCP",
        "hardware":"Intel 11th Gen Core i7-1185G7",
        "time":1,
        "certificate":"no"
    },
    "ub" : {
        "value":1234,
        "date":"2026-06-21",
        "solver":"OptalCP",
        "hardware":"Intel 11th Gen Core i7-1185G7",
        "time":1,
        "certificate":"no"
    }
}

solution.json

The benchmark scripts creates a file solution_OptalCP_{date} and writes the best solution found for instance solved, in the following format

{
    "instance" : "abz5",
    "makespan" : 1234,
    "solver" : "OptalCP",
    "date" : "2026-06-21",
    "machine_0" : [0,5,2,9,4,8,7,6,3,1],
    "machine_1" : [5,4,2,7,9,3,8,0,6,1],
    "machine_2" : [9,7,3,1,4,5,8,0,6,2],
    "machine_3" : [4,2,0,7,9,8,6,3,1,5],
    "machine_4" : [7,5,0,1,6,3,8,2,4,9],
    "machine_5" : [1,9,5,7,2,0,4,3,8,6],
    "machine_6" : [6,1,8,2,5,0,4,3,9,7],
    "machine_7" : [6,1,3,8,7,9,5,4,2,0],
    "machine_8" : [3,4,0,9,5,7,6,1,2,8],
    "machine_9" : [2,8,6,1,4,9,7,5,0,3]
},