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A Lightning web component displays the Account name and two custom fields out of 275 that exist on the object. The custom fields are correctly declared and populated. However, the developer receives complaints that the component performs slowly. 

What can the developer do to improve the performance?  

（含图）What is the correct way to communicate the new value of a property named ''passthrough'' to my-parent component if the property is defined within my-child-component? 如果名为“passthrough”的属性在我的子组件中定义，那么如何正确地将该属性的新值传递给我的父组件?

As part of the deployment process, the developer is asked to create a corresponding test class.

Which two actions should the developer take to successfully execute the test class?  

chooose 2 

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The Lightning Component allows users to click a button to save their changes and then redirects them to a different page. Currently when the user hits the Save button, the records are getting saved, but they are not redirected. Which three techniques can a developer use to debug the JavaScript?

一家公司在上面安装了 Lightning 组件，它允许用户单击按钮来保存他们的更改并将其重定向到不同的页面。目前，当用户点击 Save 按钮时，记录将被保存，但不会重定向。

Which two components should a developer use to implement the creation of the Case from the Lightning web component? 

Choose 2 answers 

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What should be changed to most optimize the code’s efficiency? Choose 2 answers