'use strict'; var common = require('../common.js'); var path = require('path'); var v8 = require('v8'); var bench = common.createBenchmark(main, { path: [ '', '/', '/foo', '/foo/bar', 'foo', 'foo/bar', '/foo/bar/baz/asdf/quux' ], n: [1e6] }); function main(conf) { var n = +conf.n; var p = path.posix; var input = '' + conf.path; // Force optimization before starting the benchmark p.dirname(input); v8.setFlagsFromString('--allow_natives_syntax'); eval('%OptimizeFunctionOnNextCall(p.dirname)'); p.dirname(input); bench.start(); for (var i = 0; i < n; i++) { p.dirname(input); } bench.end(n); }