WKWeb​View, the new web view component introduced in iOS 8.0, replaces the old, clunky, memory leaking UIWebView that has been around forever. One of it’s main benefits is the fact that it uses the Nitro JavaScript engine, the same one used by Safari. According to JavaScript benchmarks, it is 3.5 times faster than UIWebView. In addition, from community feedback so far, wkwebview reduced the memory consumption of meteor apps by a factor of almost 10 (say what???).

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