@nesvet/n/dist/benchmark.js

Various utilities

const labelMaxLength = 64;
const bold = ["\x1B[1m", "\x1B[22m"];
const underline = ["\x1B[2m", "\x1B[24m"];
const overline = ["\x1B[53m", "\x1B[55m"];
const dim = ["\x1B[2m", "\x1B[22m"];
export function benchmark(action, options = {}) {
    let { l: label } = options;
    const { t: times = 10, i: iterations = 1000000 } = options;
    if (!label) {
        label = action.toString().replaceAll(/(^(async\s*)?(function\s*)?\([^)]*\)\s*(=>(\s*await)?)?\s*{?\s*|\n+|;?\s*}?$)/g, "").replaceAll(/(\s+)/g, " ");
        if (label.length > labelMaxLength)
            label = `${label.slice(0, Math.max(0, labelMaxLength))}…`;
        label = dim[0] + label + dim[1];
    }
    let total = 0;
    console.log(`${dim[0]}${overline[0]}🎬 ${iterations} iterations × ${times} times${overline[1]}${dim[1]}`);
    for (let t = 0; t < times; t++) {
        const start = performance.now();
        let value;
        for (let i = 0; i < iterations; i++)
            value = action();
        const timeTotal = performance.now() - start;
        console.log(`🏎  ${label} ${t + 1}: ${timeTotal}${value ? ` ${value}` : ""}`);
        total += timeTotal;
    }
    console.log(`${underline[0]}🏁 ${label} total: ${bold[0]}${total}${bold[1]}${underline[1]}`);
}
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