Any function profiling

0_profilify.js

function profilify(fn, label) {
    var displayName = label || fn.name,
        called = 0,
        profilified = function() {
            var args = [].slice.call(arguments),
                startedAt = new Date(),
                defaults = { total: 0, times: 0, average: 0 },
                ret;

            profilify._stats[displayName] = profilify._stats[displayName] || defaults
            console.group(displayName + '(' + JSON.stringify(args).slice(1, -1) + ') ' + (++called) + ' times');
            console.log('called with:', args);
            console.timeStamp(displayName + 'call');
            console.time(displayName);

            ret = fn.apply(this, arguments);

            var spent = new Date() - startedAt;
            profilify._stats[displayName].times += 1;
            profilify._stats[displayName].total += spent;
            profilify._stats[displayName].average = profilify._stats[displayName].total / profilify._stats[displayName].times;
            console.timeEnd(displayName);
            console.timeStamp(displayName + 'called');
            console.log('return value:', ret);
            console.groupEnd(displayName);

            return ret;
        };

    return profilified;
}
profilify._stats = {}
profilify.stats = function() {
    var totalAll = 0,
        results = [];
    for (var displayName in profilify._stats) {
        totalAll += profilify._stats[displayName].total;
        results.push({
            displayName: displayName,
            total: profilify._stats[displayName].total,
            times: profilify._stats[displayName].times,
            average: profilify._stats[displayName].average,
        })
    }
    results.sort(function(a, b) { return a.total < b.total })
    console.log('total:', totalAll)
    for (var i in results) {
        console.log(results[i].displayName, ',', results[i].total, 's,', (results[i].total / totalAll * 100), '%,', results[i].times, 'times')
    }
};

1_usage.md

// Chrome
// https://developer.chrome.com/devtools/docs/console-api

// Safari
// https://developer.apple.com/library/mac/documentation/AppleApplications/Conceptual/Safari_Developer_Guide/Console/Console.html

// Firefox
// https://developer.mozilla.org/ja/docs/Web/API/console

// IE
// https://msdn.microsoft.com/ja-jp/library/hh772183(v=vs.85).aspx

2_example.js

// --- Demo ---
var obj = {
    hoge: function() {
        var i = 10000;
        while(i--) {
            new Array(i);
        }

        return this.foo(i);
    },
    foo: function foo() {
        return 1;
    }
};

obj.hoge = profilify(obj.hoge, 'hoge function');
obj.foo = profilify(obj.foo);

obj.hoge();
profilify.stats();