html - UIWebView scrolls slowly in iOS9 after load 50+ times -

i have uiwebview app contains local html files&css&js. in ios8 or previous,when load html string 50+ times in app bundle,it scrolls normal , not lag. in ios9,when load html string 50+ times,the scrollview of uiwebview become more , more slow.

i have create new project.just reload local html string.after load many times(50~100+),the scrollview becomes slow.a url request can cause slow well.

here new proj,you can run in device or simulator in ios9.it can reproduce.but when run in ios8,everything allright.

    - (void)viewdidload {     [super viewdidload];     uiwebview *wv = [[uiwebview alloc] initwithframe:self.view.bounds];     [self.view addsubview:wv];     self.webview = wv;     self.webview.delegate = self;     self.request= [nsurlrequest requestwithurl:[nsurl urlwithstring:@"http://www.google.com"]];     [self.webview loadrequest:self.request];     self.refreshcount = 0; }  - (void)webviewdidfinishload:(uiwebview *)webview {     [self.webview loadrequest:_request];     nslog(@"refreshcount = %lu",(unsigned long)_refreshcount++); } 

any solution?

use gcd's or nsoperationqueues in order load them quickly.