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ThreadLocal变量的性能(Performance of ThreadLocal variable)

 从ThreadLocal变量读取多少比常规字段慢？ 
 

 更具体地说，简单的对象创建比访问ThreadLocal变量更快或更慢？ 
 

 我假设它足够快，所以每次创建ThreadLocal<MessageDigest>实例要快得多，因此ThreadLocal<MessageDigest>实例要快得多。 但是，这也适用于byte [10]或byte [1000]吗？ 
 

 编辑：问题是当调用ThreadLocal的时候会发生什么事情？ 如果这只是一个领域，像任何其他的，那么答案就是“总是最快的”，对吧？ 

How much is read from ThreadLocal variable slower than from regular field?
 

More concretely is simple object creation faster or slower than access to ThreadLocal variable?
 

I assume that it is fast enough so that having ThreadLocal<MessageDigest> instance is much faster then creating instance of MessageDigest every time. But does that also apply for byte[10] or byte[1000] for example?
 

Edit: Question is what is really going on when calling ThreadLocal's get? If that is just a field, like any other, then answer would be "it's always fastest", right?

原文：https://stackoverflow.com/questions/609826
更新时间：2022-12-01 07:12

最满意答案

 您不能内嵌JS对象，但您可以JSON.stringify之前： 
 

<script type="text/javascript">
  var data = !{JSON.stringify(data)};
</script>


You can't inline a JS object like that, but you can JSON.stringify it before:
 

<script type="text/javascript">
  var data = !{JSON.stringify(data)};
</script>

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