WebViewWarmupper

Warmup WKWebView Helper.

Why

WKWebView inititalize is very slowly. Pre initialize when UI Thread not busy make it better.

Installation

Cocoapods

pod 'WebViewWarmupper'

Carthage

github "simorgh3196/WebViewWarmupper"

Usage

let warmupper = WebViewWarmupper(maxSize: 3)

// warmup a WKWebView instance.
warmupper.warmup()

// warmup some WKWebView instances.
warmupper.warmup(2)

// warmup WKWebView instance up to max size.
warmupper.warmupUpToSize()

let webView = warmupper.getView()

[Advanced] Custom WKWebView initialization

class MyWebViewWarmupper: ViewWarmupper<WKWebView> {

    init() {
        super.init(maxSize: 3) {
            let script = WKUserScript(
              source: "#custom_javascript",
              injectionTime: .atDocumentStart,
              forMainFrameOnly: false)
            let contentController = WKUserContentController()
            contentController.addUserScript(script)
            let configuration = WKWebViewConfiguration()
            configuration.userContentController = contentController

            return WKWebView(frame: .zero, configuration: configuration)
        }
    }
}

Performance

Check performance for Example project

		Warmuped WKWebView	Shared WKWebView	Simple WKWebView	Simple UIWebView
1		0.05490398406982422	0.07083094120025635	0.7591549158096313	0.8732810020446777
2		0.029172897338867188	0.05423104763031006	0.45792603492736816	0.02630794048309326
3		0.03314995765686035	0.023260951042175293	0.3551570177078247	0.021090030670166016
4		0.030402064323425293	0.02096700668334961	0.36775505542755127	0.021376967430114746
5		0.030902981758117676	0.02869093418121338	0.3720470666885376	0.020707011222839355
6		0.02951192855834961	0.02883601188659668	0.48676598072052	0.021302103996276855
7		0.0360109806060791	0.0317530632019043	0.4646350145339966	0.02109396457672119
8		0.030125975608825684	0.022431015968322754	0.39225101470947266	0.018939971923828125
9		0.041404008865356445	0.022022008895874023	0.44484400749206543	0.027421951293945312
10		0.03253495693206787	0.026466012001037598	0.4506809711456299	0.020102977752685547
Ave		0.034811973571777344	0.03294889926910401	0.4551217079162598	0.10716239213943482