Very often, batching similar work has benefits. Web browsers do something quite similar by batching changes to the DOM.
Consider the following HTML snippet :
<div id="foo"></div>
<div id="bar"></div>
<div id="baz"></div>
and executing the following code :
foo.style.height = '500px' // write
foo.offsetHeight // read (recalculate style, layout, expensive!)
bar.style.height = '400px' // write
bar.offsetHeight // read (recalculate style, layout, expensive!)
baz.style.height = '200px' // write
baz.offsetHeight // read (recalculate style, layout, expensive!)
