Faster mounting

[maciejhirsz]

• Use child.constructor to tests for built in types: String, Number and Array
• Reordered to return early for all the types above.
• Identify instances of Node by checking the built in Node#nodeType integer instead of using instanceof, avoiding traversing the prototype inheritance chain.
• Super minor: moved mounted / remounted calls behind the check for child being a bare Node. Benefits are close to none, but the cost in complexity is zero, so why not.

Code tested:

div(
    h1({ 'class': 'frzr' }, 'Hello ', b('FRZR'), '!'),
    p('Bacon ipsum dolor amet meatloaf meatball shank porchetta \
        picanha bresaola short loin short ribs capicola fatback beef \
        ribs corned beef ham hock.')
);

Before:

Benching FRZR <div> with multiple child nodes
29960ns per iteration (33377 ops/sec)

After:

Benching FRZR <div> with multiple child nodes
13010ns per iteration (76862 ops/sec)

VanillaJS with innerHTML to compare:

var div = document.createElement('div');
div.innerHTML = '<h1 class="frzr">Hello <b>FRZR</b>!</h1>\
<p>\
    Bacon ipsum dolor amet meatloaf meatball shank porchetta \
    picanha bresaola short loin short ribs capicola fatback beef \
    ribs corned beef ham hock.\
</p>';

Benching Vanilla JS innerHTML
build.js:19 - 23341ns per iteration (42843 ops/sec)

Tried to not add any amount of code that isn't strictly necessary, there is +9 lines but some of those are whitespace :).

[maciejhirsz]

Also #35

[pakastin]

Wow, you're on fire! ⚡️

[pakastin]

Good stuff! That trick of checking the constructor is especially brilliant. 👍

[pakastin]

Released, thanks again!