问题
i create a html string with 500 p tag with timestamp in it
i use UIWebView and WKWebView loadHTMLString:baseURL: to load it,and wkWebView is slower about 50% than UIWebVIew. why?
UIWebView:0.1681529879570007
WKWebView:0.3913570046424866
回答1:
WKWebView is faster for displaying html from Strings. However, there is a bug that makes UIWebView faster by default, which is the phone number detection.
Running a viewController with the following code, webView being respectively a UIWebView and WKWebView instance and keeping everything else identical I found WKWebView to take up to 2 seconds to load, while UIWebView loads almost instantly.
webView.loadHTMLString(HtmlStringInstance, baseURL: nil)
I'm by far not the only one to find this:
- when I use wkwebview to load local html,I find it renders slower than uiwebview
- UIWebView delay in loading local content
- Slow loading UIWebView from string
- Delay in loading a HTML string into a UIWebView
- Why UIWebView work so slowly when loadHTMLString with UIWebView?
However, the solution is easy: Disable phone number detection for WKWebView and poof. There you go.
回答2:
WKWebView rendering performance is noticeable in WebGL games and something that runs complex JavaScript algorithms which UIWebView lacks.
You check the performance both in the Github.
来源：https://stackoverflow.com/questions/40499466/uiwebview-vs-wkwebview-to-load-local-html