如何让setTimeout方法间隔时间更为精确

function timer() {
var speed = 500,
counter = 1,
start = new Date().getTime();

function instance()
{
var ideal = (counter * speed),
real = (new Date().getTime() - start);

counter++;

var diff = (real - ideal);
form.diff.value = diff;

window.setTimeout(function() { instance(); }, (speed - diff)); // 通过系统时间进行修复

};

window.setTimeout(function() { instance(); }, speed);
}
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原文链接：https://blog.csdn.net/tongbowen_123/article/details/118068297