有没有办法加速这个解决方案不区分大小写的jQuery：包含选择器？ [英] Is there any way to speed up this solution for a case-insensitive jQuery :contains selector?
问题描述
我找到了此解决方案一个不区分大小写的jQuery ：在StackOverflow上包含选择器。它运行良好，但它以性能为代价。有没有其他人觉得这个解决方案有点慢？
I found this solution for a case-insensitive jQuery :contains selector on StackOverflow. It works great, however it comes at the cost of performance. Does anyone else find this solution to be a bit slow?
我正在使用：contains 选择器进行搜索一张桌子。用户在文本框中键入搜索字符串。对于每次击键，它会在表中搜索该字符串，仅通过：contains 选择器显示包含该字符串的行。在实施不区分大小写的解决方案之前，此搜索快速而且快速。现在有了这个解决方案，它会在每次击键后锁定一小段时间。
I'm using the :contains selector to search a table. The user types a search string into a textbox. For each keystroke, it searches the table for that string, showing only the rows that contain that string via the :contains selector. Before implementing the case-insensitive solution, this search was quick and snappy. Now with this solution, it locks up for a brief moment after each keystroke.
关于如何加快这个解决方案的任何想法？
Any ideas on how this solution could be sped up?
推荐答案
我在Google上找到了另一种不区分大小写搜索的解决方案（参见 Eric Phan ）与我最初使用的版本略有不同。
I found another solution of the case-insensitive search on Google (see Eric Phan) which varies slightly from the one I was originally using.
原文：
return jQuery(a).text().toUpperCase().indexOf(m[3].toUpperCase())>=0;
EricPhan：
return (a.textContent || a.innerText || "").toLowerCase().indexOf(m[3].toLowerCase())>=0;
比较两者，你可以看到Eric Phan的解决方案直接访问DOM属性并使用 toLowerCase（）而不是 toUpperCase（）。后者并不重要，但前者真正改善了不区分大小写搜索的性能。只需将原始解决方案更改为使用（a.textContent || a.innerText ||）而不是 jQuery（a）.text（） 完全不同！
Comparing the two, you can see Eric Phan's solution accesses the DOM attributes directly and uses toLowerCase() instead of toUpperCase(). The latter doesn't really matter, but the former is what really improved the performance of the case-insensitive search. Just changing the original solution to use (a.textContent || a.innerText || "") instead of jQuery(a).text() made all the difference!
现在我有点好奇，所以这是一个后续问题：与$ code> jQuery.text（）？为什么这么慢？我有我的假设，但我很想听听专家们的意见。
Now I'm a bit curious, so here's a follow up question: What's the deal with jQuery.text()? Why's it so slow? I have my assumptions, but I'd love to hear what the experts have to say.
最后，感谢所有回复的人。我恭维你的帮助。 =）
Lastly, thanks to everyone who responded. I appreicate your help. =)
这篇关于有没有办法加速这个解决方案不区分大小写的jQuery：包含选择器？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
