Javascript path.node（）.getTotalLength（）挂起浏览器

我试图生成一个折线图，但尝试使用函数getTotalLength（）获取svg路径的长度时出错。这对我来说很奇怪，因为Firefox 19.0.2运行得很好，但Safari 6.0.2和Chrome 25.0.1364.160运行不好

发生错误的代码如下所示：

          function displayValueLabelsForPositionX(xPosition) {
            if (typeof jsondata.length == 'undefined') {
                return;
            }

            // position label values
            var pathEl = path.node();     
            var pathLength = pathEl.getTotalLength();

           (...)
         }

调用pathEl.getTotalLength（）时始终会发生错误，路径似乎正确，但长度为150KB：

<path class=​"line" d=​"M0.0020634675065341434,384.8476217601823C0.002751290008712191,384.8476217601822,0.0034391125108902388,384.8476217601822,0.004126935013068286,384.8476217601823C0.0048147575152463346,384.8476217601822,0.005502580017424381,384.8476217601822,0.006018446894057917,384.8476217601823C0.006534313770691453,384.8476217601822,0.006878225021780477,384.8476217601822,0.61216202693

(...)

1006.9979365324934,312.1617772714327" clip-path=​"url(#clip)​">​</path>​

​​

有什么想法吗？没有这个函数，还有其他方法可以得到这个长度吗

问候,，

---

Joan

这个更简单的路径也挂起：path类=​“行”d=​“M50005000 C49705018 5129.54917.5 5099.54967.5”