Compare two benchmark outputs

[xhyrom]

It would be useful if it could be set to automatically save the output of the benchmark (e.g. to .json) and then the two could be automatically compared to produce something like this:

I made simple script:

import { summary } from 'mitata/reporter/table.mjs';
import { join } from 'node:path';

const __dirname = new URL('.', import.meta.url).pathname;

const outputBunUtilities = JSON.parse(await (await Bun.file(join(__dirname, 'outputs', 'bun-utilities.json'))).text()).benchmarks.map(b => {
    return { ...b, name: `[bun-utilities] ${b.name}`, id: b.name };
});
const outputNodeChildProcess = JSON.parse(await (await Bun.file(join(__dirname, 'outputs', 'node-fs.json'))).text()).benchmarks.map(b => {
    return { ...b, name: `[node-fs] ${b.name}`, id: b.name };
});

const benchmarks = [].concat(outputBunUtilities, outputNodeChildProcess);
const summaries = [
    'copydir empty',
    'copydir files',
    'rmdir empty',
    'rmdir files'
];

for (const summaryName of summaries) {
    const filtered = benchmarks.filter(b => b.id === summaryName);
    console.log(summary(filtered));
}