const warmUpCount = 8
const iterationCount = 64

class C {}

C.C0=1
C.C1=1
C.C2=2
C.C3=3
C.C4=4
C.C5=5
C.C6=6
C.C7=7
C.C8=8
C.C9=9
C.C10=10
C.C11=11
C.C12=12
C.C13=13
C.C14=14
C.C15=15

no_folding_const_refs_test = benchmarkAverage(no_folding_const_refs_test);
no_folding_const_literals_test = benchmarkAverage(no_folding_const_literals_test);
folding_test = benchmarkAverage(folding_test);


console.log(`no_folding_const_refs_test: ${no_folding_const_refs_test} ns`)
console.log(`no_folding_const_literals_test: ${no_folding_const_literals_test} ns`)
console.log(`folding_test: ${folding_test} ns`)


function benchmarkAverage(func) {
    console.log(`function ${func.name}:`)

    console.log("warm up...")
    for (let i = 0; i < warmUpCount; i++) {
        func();
    }
    console.log("warm up completed.")

    console.log("benchmark...")

    let startTime = process.hrtime();

    for (let i = 0; i < iterationCount; i++) {
        func();
    }

    let elapsed = process.hrtime(startTime);
    let elapsedNs = Math.round((elapsed[0] * 1e6 + elapsed[1] / 1e3) * 1000 / iterationCount);

    console.log("benchmark completed.")
    console.log("")

    return elapsedNs;
}


function no_folding_const_refs_test() {
    return (1 << C.C0) | (1 << C.C1) | (1 << C.C2) | (1 << C.C3) |
           (1 << C.C4) | (1 << C.C5) | (1 << C.C6) | (1 << C.C7) |
           (1 << C.C8) | (1 << C.C9) | (1 << C.C10) | (1 << C.C11) |
           (1 << C.C12) | (1 << C.C13) | (1 << C.C14) | (1 << C.C15);
}

function no_folding_const_literals_test() {
    return (1 << 0) | (1 << 1) | (1 << 2) | (1 << 3) |
           (1 << 4) | (1 << 5) | (1 << 6) | (1 << 7) |
           (1 << 8) | (1 << 9) | (1 << 10) | (1 << 11) |
           (1 << 12) | (1 << 13) | (1 << 14) | (1 << 15);
}

function folding_test() {
    return 0xFFFF
}