With WestLangley suggestions

Add a new variable to avoid instantiation of a Vector3 in each call to
THREE.Triangle.barycoordFromPoint().

Defer calculus after the near plane / far plane test. Need to do a copy
of intersectionPoint due to the applyMatrix4.

Test with a PlaneBufferGeometry and a BoxGeometry. Didn’t test with
indexed BufferGeometry (don’t have any in my program) but I’m quite
comfortable the uvA, uvB and uvC are the right one in that case.

src/objects/Mesh.js

@@ -73,6 +73,8 @@ THREE.Mesh.prototype.raycast = ( function () {
 	var uvA = new THREE.Vector2();
 	var uvB = new THREE.Vector2();
 	var uvC = new THREE.Vector2();
+	var bary = new THREE.Vector3();
+	var pInter = new THREE.Vector3();
 
 	return function raycast( raycaster, intersects ) {
 
@@ -113,7 +115,7 @@ THREE.Mesh.prototype.raycast = ( function () {
 
 		var textureIntersection = function ( pIntersection, p1, p2, p3, uv1, uv2, uv3 ) {
 
-			var bary = THREE.Triangle.barycoordFromPoint( pIntersection, p1, p2, p3 );
+			THREE.Triangle.barycoordFromPoint( pIntersection, p1, p2, p3, bary );
 
 			uv1.multiplyScalar( bary.x );
 			uv2.multiplyScalar( bary.y );
@@ -171,21 +173,24 @@ THREE.Mesh.prototype.raycast = ( function () {
 
 						if ( intersectionPoint === null ) continue;
 
+						pInter.copy(intersectionPoint);
+						intersectionPoint.applyMatrix4( this.matrixWorld );
+
+						var distance = raycaster.ray.origin.distanceTo( intersectionPoint );
+
+						if ( distance < raycaster.near || distance > raycaster.far ) continue;
+
 						// intersectionPoint in UV coordinates.
 						var uv = undefined;
 						if ( material.map && attributes.uv !== undefined ) {
+
 							var uvs = attributes.uv.array;
 							uvA.fromArray( uvs, a * 2 );
 							uvB.fromArray( uvs, b * 2 );
 							uvC.fromArray( uvs, c * 2 );
-							uv = textureIntersection( intersectionPoint, vA, vB, vC, uvA, uvB, uvC )
-						}
+							uv = textureIntersection( pInter, vA, vB, vC, uvA, uvB, uvC );
 
-						intersectionPoint.applyMatrix4( this.matrixWorld );
-
-						var distance = raycaster.ray.origin.distanceTo( intersectionPoint );
-
-						if ( distance < raycaster.near || distance > raycaster.far ) continue;
+						}
 
 						intersects.push( {
 
@@ -224,21 +229,24 @@ THREE.Mesh.prototype.raycast = ( function () {
 
 					if ( intersectionPoint === null ) continue;
 
+					pInter.copy(intersectionPoint);
+					intersectionPoint.applyMatrix4( this.matrixWorld );
+
+					var distance = raycaster.ray.origin.distanceTo( intersectionPoint );
+
+					if ( distance < raycaster.near || distance > raycaster.far ) continue;
+
 					// intersectionPoint in UV coordinates.
 					var uv = undefined;
 					if ( material.map && attributes.uv !== undefined ) {
+
 						var uvs = attributes.uv.array;
 						uvA.fromArray( uvs, i );
 						uvB.fromArray( uvs, i + 2 );
 						uvC.fromArray( uvs, i + 4 );
-						uv = textureIntersection( intersectionPoint, vA, vB, vC, uvA, uvB, uvC )
-					}
-
-					intersectionPoint.applyMatrix4( this.matrixWorld );
+						uv = textureIntersection( pInter, vA, vB, vC, uvA, uvB, uvC );
 
-					var distance = raycaster.ray.origin.distanceTo( intersectionPoint );
-
-					if ( distance < raycaster.near || distance > raycaster.far ) continue;
+					}
 
 					a = i / 3;
 					b = a + 1;
@@ -323,21 +331,24 @@ THREE.Mesh.prototype.raycast = ( function () {
 
 				if ( intersectionPoint === null ) continue;
 
+				pInter.copy(intersectionPoint);
+				intersectionPoint.applyMatrix4( this.matrixWorld );
+
+				var distance = raycaster.ray.origin.distanceTo( intersectionPoint );
+
+				if ( distance < raycaster.near || distance > raycaster.far ) continue;
+
 				// intersectionPoint in UV coordinates.
 				var uv = undefined;
 				if ( material.map && geometry.faceVertexUvs[ 0 ] !== undefined ) {
+
 					var uvs = geometry.faceVertexUvs[ 0 ][ f ];
 					uvA.copy( uvs[ 0 ] );
 					uvB.copy( uvs[ 1 ] );
 					uvC.copy( uvs[ 2 ] );
-					uv = textureIntersection( intersectionPoint, a, b, c, uvA, uvB, uvC )
-				}
-
-				intersectionPoint.applyMatrix4( this.matrixWorld );
-
-				var distance = raycaster.ray.origin.distanceTo( intersectionPoint );
+					uv = textureIntersection( pInter, a, b, c, uvA, uvB, uvC );
 
-				if ( distance < raycaster.near || distance > raycaster.far ) continue;
+				}
 
 				intersects.push( {