Experimental Performance Evaluation of Enhanced User Interaction Components for Web-Based Collaborative Extended Reality  
[PERSON]  
1 Department of Computers and Informatics, Faculty of Electrical Engineering and Informatics, Technical University of Kosice, Letna 9, 042 00 Kosice, Slovakia; [EMAIL_ADDRESS] (M.H. ); [EMAIL_ADDRESS] (B.S. ); [EMAIL_ADDRESS] (M.S. ); [EMAIL_ADDRESS] (W.S.) [PERSON]  
1 Department of Computers and Informatics, Faculty of Electrical Engineering and Informatics, Technical University of Kosice, Letna 9, 042 00 Kosice, Slovakia; [EMAIL_ADDRESS] (M.H. ); [EMAIL_ADDRESS] (B.S. ); [EMAIL_ADDRESS] (M.S. ); [EMAIL_ADDRESS] (W.S.) [PERSON]  
1 Department of Computers and Informatics, Faculty of Electrical Engineering and Informatics, Technical University of Kosice, Letna 9, 042 00 Kosice, Slovakia; [EMAIL_ADDRESS] (M.H. ); [EMAIL_ADDRESS] (B.S. ); [EMAIL_ADDRESS] (M.S. ); [EMAIL_ADDRESS] (W.S.) [PERSON]  
1 Department of Computers and Informatics, Faculty of Electrical Engineering and Informatics, Technical University of Kosice, Letna 9, 042 00 Kosice, Slovakia; [EMAIL_ADDRESS] (M.H. ); [EMAIL_ADDRESS] (B.S. ); [EMAIL_ADDRESS] (M.S. ); [EMAIL_ADDRESS] (W.S.) [PERSON]  
2 Department of Electronics and Multimedia Communications, Faculty of Electrical Engineering and Informatics, Technical University of Kosice, Nemcove 32, 042 00 Kosice, Slovakia; [EMAIL_ADDRESS] (S.K. ); [EMAIL_ADDRESS] (M.P. ); Tel. : +421-55-602-4313 (S.K.) [PERSON]  
1 Department of Computers and Informatics, Faculty of Electrical Engineering and Informatics, Technical University of Kosice, Letna 9, 042 00 Kosice, Slovakia; [EMAIL_ADDRESS] (M.H. ); [EMAIL_ADDRESS] (B.S. ); [EMAIL_ADDRESS] (M.S. ); [EMAIL_ADDRESS] (W.S.) Footnote 1: email: {[EMAIL_ADDRESS], {korecko@tuke. environment to web browsers. Extended reality (XR) is an umbrella term, covering virtual, augmented and mixed reality. Web-based extended reality simplifies users' access through a variety of devices under different operating systems ([PERSON] et al., 2017). The usage of web-based XR has been increasing since 2017 when Augmented Reality (AR) and Mixed Reality (MR) were united in the same development process with VR. This resulted in WebXR Device API ([[https://www.w3.org/TR/webxr/](https://www.w3.org/TR/webxr/)]([https://www.w3.org/TR/webxr/](https://www.w3.org/TR/webxr/)), accessed on 22 April 2021) ([PERSON] et al., 2021), a W3C specification defining access to both VR and AR devices. One of the most recognized software frameworks for developing XR web applications is A-Frame ([[https://aframe.io/](https://aframe.io/)]([https://aframe.io/](https://aframe.io/)), accessed on 22 April 2021). It is an open-source platform, which supports most of the contemporary XR hardware. Initially created by the Mozilla VR team in 2015, its development is now led by experts from Supermedium and Google. A valuable extension of the framework is Networked-Aframe (NAF) ([[https://github.com/networked-aframe](https://github.com/networked-aframe)]([https://github.com/networked-aframe](https://github.com/networked-aframe)), accessed on 22 April 2021), which allows multiple users to share virtual environments, created using A-Frame, in real time. To extend the functionality of A-Frame and NAF and address some of their limitations, new components were proposed and evaluated by the authors. The components, together with a selection of virtual environments (scenes), constitute a platform called LIKRIS Global--Collaborative Virtual Environments (G-CVE) ([PERSON] et al., 2017; [PERSON] et al., 2018; [PERSON] et al., 2019). An instance of LIKRIS G-CVE, with all the components described and evaluated here, is available at [[https://likisgceve.herokuapp.com/](https://likisgceve.herokuapp.com/)]([https://likisgceve.herokuapp.com/](https://likisgceve.herokuapp.com/)) (accessed on 22 April 2021). The original contribution of this paper dwells in a performance evaluation of three of the proposed components under different loads.