Babylon.js is now compiled with [optimize-js](https://github.com/nolanlawson/optimize-js) to get faster initial load

Tools/Gulp/gulpfile.js

@@ -13,6 +13,7 @@ var runSequence = require('run-sequence');
 var replace = require("gulp-replace");
 var uncommentShader = require("./gulp-removeShaderComments");
 var expect = require('gulp-expect-file');
+var optimisejs = require('gulp-optimize-js');
 
 var config = require("./config.json");
 
@@ -131,6 +132,7 @@ gulp.task("buildCore", ["shaders"], function () {
         .pipe(replace(decorateSearchRegex, ""))
         .pipe(addModuleExports("BABYLON"))
         .pipe(uglify())
+        .pipe(optimisejs())
         .pipe(gulp.dest(config.build.outputDirectory));
 });
 
@@ -149,6 +151,7 @@ gulp.task("buildNoWorker", ["shaders"], function () {
         .pipe(replace(decorateSearchRegex, ""))
         .pipe(addModuleExports("BABYLON"))
         .pipe(uglify())
+        .pipe(optimisejs())
         .pipe(gulp.dest(config.build.outputDirectory));
 });
 
@@ -170,6 +173,7 @@ gulp.task("build", ["workers", "shaders"], function () {
         .pipe(gulp.dest(config.build.outputDirectory))
         .pipe(rename(config.build.minFilename))
         .pipe(uglify())
+        .pipe(optimisejs())
         .pipe(gulp.dest(config.build.outputDirectory));
 });
 

Tools/Gulp/package.json

@@ -22,6 +22,7 @@
     "run-sequence": "~1.1.0",
     "gulp-replace": "~0.5.3",
     "gulp-content-to-variable": "^0.1.0",
-    "gulp-expect-file": "^0.0.7"
+    "gulp-expect-file": "^0.0.7",
+    "gulp-optimize-js": "^1.0.2"
   }
 }

dist/preview release/babylon.max.js

@@ -13698,6 +13698,10 @@ var BABYLON;
             window.removeEventListener("deviceorientation", this._deviceOrientation);
         };
         FreeCameraDeviceOrientationInput.prototype.checkInputs = function () {
+            //if no device orientation provided, don't update the rotation.
+            //Only testing against alpha under the assumption thatnorientation will never be so exact when set.
+            if (!this._alpha)
+                return;
             BABYLON.Quaternion.RotationYawPitchRollToRef(BABYLON.Tools.ToRadians(this._alpha), BABYLON.Tools.ToRadians(this._beta), -BABYLON.Tools.ToRadians(this._gamma), this.camera.rotationQuaternion);
             this._camera.rotationQuaternion.multiplyInPlace(this._screenQuaternion);
             this._camera.rotationQuaternion.multiplyInPlace(this._constantTranform);
@@ -55391,6 +55395,7 @@ var BABYLON;
         __extends(DeviceOrientationCamera, _super);
         function DeviceOrientationCamera(name, position, scene) {
             _super.call(this, name, position, scene);
+            this._quaternionCache = new BABYLON.Quaternion();
             this.inputs.addDeviceOrientation();
         }
         DeviceOrientationCamera.prototype.getTypeName = function () {
@@ -55398,8 +55403,8 @@ var BABYLON;
         };
         DeviceOrientationCamera.prototype._checkInputs = function () {
             _super.prototype._checkInputs.call(this);
+            this._quaternionCache.copyFrom(this.rotationQuaternion);
             if (this._initialQuaternion) {
-                this._quaternionCache.copyFrom(this.rotationQuaternion);
                 this._initialQuaternion.multiplyToRef(this.rotationQuaternion, this.rotationQuaternion);
             }
         };
@@ -55422,6 +55427,8 @@ var BABYLON;
                 }
             });
             this._initialQuaternion.normalize();
+            //force rotation update
+            this._initialQuaternion.multiplyToRef(this.rotationQuaternion, this.rotationQuaternion);
         };
         return DeviceOrientationCamera;
     })(BABYLON.FreeCamera);

dist/preview release/what's new.md

@@ -2,6 +2,7 @@
 
 ### Major updates
 - Babylon.js now supports right handed system with ```scene.useRightHandedSystem = true``` ([deltakosh](https://github.com/deltakosh))
+- Babylon.js is now compiled with [optimize-js](https://github.com/nolanlawson/optimize-js) to get faster initial load ([deltakosh](https://github.com/deltakosh))
 
 ### Updates
 - New ```Tools.CreateScreenshot``` function will capture all canvas data. Previous implementation is now called `CreateScreenshotUsingRenderTarget` ([deltakosh](https://github.com/deltakosh)) 

src/Cameras/Inputs/babylon.freecamera.input.deviceorientation.js

@@ -45,6 +45,10 @@ var BABYLON;
             window.removeEventListener("deviceorientation", this._deviceOrientation);
         };
         FreeCameraDeviceOrientationInput.prototype.checkInputs = function () {
+            //if no device orientation provided, don't update the rotation.
+            //Only testing against alpha under the assumption thatnorientation will never be so exact when set.
+            if (!this._alpha)
+                return;
             BABYLON.Quaternion.RotationYawPitchRollToRef(BABYLON.Tools.ToRadians(this._alpha), BABYLON.Tools.ToRadians(this._beta), -BABYLON.Tools.ToRadians(this._gamma), this.camera.rotationQuaternion);
             this._camera.rotationQuaternion.multiplyInPlace(this._screenQuaternion);
             this._camera.rotationQuaternion.multiplyInPlace(this._constantTranform);

src/Cameras/babylon.deviceOrientationCamera.js

@@ -10,6 +10,7 @@ var BABYLON;
         __extends(DeviceOrientationCamera, _super);
         function DeviceOrientationCamera(name, position, scene) {
             _super.call(this, name, position, scene);
+            this._quaternionCache = new BABYLON.Quaternion();
             this.inputs.addDeviceOrientation();
         }
         DeviceOrientationCamera.prototype.getTypeName = function () {
@@ -17,8 +18,8 @@ var BABYLON;
         };
         DeviceOrientationCamera.prototype._checkInputs = function () {
             _super.prototype._checkInputs.call(this);
+            this._quaternionCache.copyFrom(this.rotationQuaternion);
             if (this._initialQuaternion) {
-                this._quaternionCache.copyFrom(this.rotationQuaternion);
                 this._initialQuaternion.multiplyToRef(this.rotationQuaternion, this.rotationQuaternion);
             }
         };
@@ -41,6 +42,8 @@ var BABYLON;
                 }
             });
             this._initialQuaternion.normalize();
+            //force rotation update
+            this._initialQuaternion.multiplyToRef(this.rotationQuaternion, this.rotationQuaternion);
         };
         return DeviceOrientationCamera;
     })(BABYLON.FreeCamera);