benchmark.js

// npm i benchmark beautify-benchmark bh bemer
// node benchmark.js

var Benchmark = require('benchmark');
var suite = new Benchmark.Suite();
var benchmarks = require('beautify-benchmark');

var BH = require('bh').BH;
var bh = new BH();
var bemer = require('bemer');

function construct(obj, depth) {
    if (depth < 5) {
        obj.content = [
            construct({ block: 'block' },  depth + 1),
            construct({ block: 'block' },  depth + 1),
            construct({ block: 'block' },  depth + 1)
        ];
    }
    return obj;
}
suite
.add('bemer#block', function() {
    bemer(
        construct({ block: 'block' }, 0)
    );
})
.add('bh#block', function() {
    bh.apply(
        construct({ block: 'block' }, 0)
    );
})
.on('cycle', function(event) { benchmarks.add(event.target); })
.on('complete', function() { benchmarks.log(); })
.run({ 'async': true });