Improve startup speed

app/build.gradle

@@ -38,7 +38,7 @@ android {
         minSdkVersion 16
         targetSdkVersion 31
         versionCode 69
-        versionName "5.2.20"
+        versionName "5.2.21"
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
         vectorDrawables.useSupportLibrary = true
     }

app/release/output-metadata.json

@@ -12,7 +12,7 @@
       "filters": [],
       "attributes": [],
       "versionCode": 69,
-      "versionName": "5.2.20",
+      "versionName": "5.2.21",
       "outputFile": "app-release.apk"
     }
   ],

app/src/main/java/xyz/quaver/pupil/Pupil.kt

@@ -160,19 +160,20 @@ fun initWebView(context: Context) {
 
         webViewClient = object: WebViewClient() {
             override fun onPageFinished(view: WebView?, url: String?) {
+                webViewReady = true
+
                 webView.evaluateJavascript(
                     """
-                        try {
-                            new Function('(x => x?.y ?? z)');
-                            true;
-                        } catch (err) {
-                            false;
-                        }
-                    """.trimIndent()
+                    try {
+                        new Function('(x => x?.y ?? z)');
+                        true;
+                    } catch (err) {
+                        false;
+                    }
+                """.trimIndent()
                 ) {
                     val es2020: Boolean = Json.decodeFromString(it)
 
-                    webViewReady = es2020
                     oldWebView = !es2020
                 }
             }

app/src/main/java/xyz/quaver/pupil/hitomi/common.kt

@@ -53,7 +53,7 @@ suspend inline fun <reified T> WebView.evaluate(script: String): T = coroutineSc
 
     while (result == null) {
         try {
-            while (!oldWebView && !(webViewReady && !webViewFailed)) yield()
+            while (!oldWebView && !(webViewReady && !webViewFailed)) delay(100)
 
             result = if (oldWebView)
                 "null"
@@ -82,7 +82,7 @@ suspend inline fun <reified T> WebView.evaluatePromise(
 
     while (result == null) {
         try {
-            while (!oldWebView && !(webViewReady && !webViewFailed)) yield()
+            while (!oldWebView && !(webViewReady && !webViewFailed)) delay(100)
 
             result = if (oldWebView)
                 "null"