## 4 Performance Analysis of the Generated Models in Virtual Environments
### Performance Analysis of Models
#### 4.2.1 Frame Rate  
This metric, commonly measured in Frames Per Second (FPS), critically affects the user experience in an application, as a low frame rate results in the application feeling slower and less fluid, showing much greater latency in response to user actions. Additionally, a low frame rate can also indicate that the workload is not suitable for the hardware on which it is running. In our case, the most critical components are the CPU and GPU of the headset responsible for rendering the 3D models. It is important to note that the frame rate should be close to the refresh rate (60-72 Hz) for the VR application experience to be pleasant and smooth. In Figure 9, we can observe the frame \begin{table}
\begin{tabular}{l l l l l l l} \hline \hline \multirow{2}{*}{**Scene**} & \multirow{2}{*}{\begin{tabular}{c} **N\({}^{*}\) of Objects** \\ **(N\({}^{*}\) Polygons)** \\ \end{tabular} } & \multicolumn{1}{c}{**Average**} & \multicolumn{1}{c}{**App GPU**} & \multirow{2}{*}{\
\begin{tabular}{c} **GPU U \(\geq\) 99\%** \\ \end{tabular} } & \multicolumn{1}{c}{
\begin{tabular}{c} **Average** \\ **Prediction \%** \\ \end{tabular} } \\  & & & & & & \\ \hline \multicolumn{6}{c}{**Meta Quest 2**} \\ \hline
**SimpleLowPoly** & 4 LP (99.806) & 71.37 & 6.35 & 0.00 & 0.00 & 0.00 \\
**6 xLowPoly** & 24 LP (597.648) & 71.16 & 10.20 & 0.00 & 0.00 & 0.00 \\
**12 xLowPoly** & 48 LP (1,195,296) & 71.74 & 15.15 & 0.00 & 6.06 & 0.00 \\
**18 xLowPoly** & 72 LP (1,792,494) & 59.47 & 62.90 & 30.71 & 32.26 & 3.22 \\
**24 xLowPoly** & 96 LP (2,390,592) & 56.21 & 64.52 & 48.38 & 32.26 & 11.29 \\
**SimpleMediumPoly** & 4 MP (599,600) & 69.22 & 16.00 & 0.00 & 0.00 & 0.00 \\
**3 xMediumPoly** & 12 MP (1,798,800) & 48.81 & 80.00 & 57.33 & 17.33 & 29.33 \\
**6 xMediumPoly** & 24 MP (5,597,600) & 29.61 & 45.00 & 61.67 & 56.66 & 8.33 \\
**SimpleHighPoly** & 4 HP (3,527,888) & 9.30 & 10.0 & 30.00 & 93.33 & 78.33 \\
**3 xHighPoly** & 12 HP (10,583,644) & 8.75 & 1.66 & 33.33 & 93.33 & 56.66 \\ \hline \multicolumn{6}{c}{**Meta Quest Pro**} \\ \hline
**SimpleLowPoly** & 4 LP (99.806) & 71.63 & 11.66 & 0.00 & 0.00 & 0.00 \\
**6 xLowPoly** & 24 LP (597,648) & 71.56 & 16.66 & 0.00 & 0.00 & 0.00 \\
**12 xLowPoly** & 48 LP (1195,296) & 69.28 & 43.33 & 5.00 & 11.66 & 1.67 \\
**18 xLowPoly** & 72 LP (1,792,944) & 60.16 & 65.00 & 35.00 & 13.33 & 5.00 \\
**24 xLowPoly** & 96 LP (2,390,592) & 44.56 & 78.33 & 71.67 & 30.00 & 6.67 \\ SimpleMediumPoly & 4 MP (999,600) & 71.48 & 20.00 & 0.00 & 3.33 & 0.00 \\
**3 xMediumPoly** & 12 MP (1,798,800) & 56.94 & 88.33 & 63.33 & 20.00 & 30.00 \\
**6 xMediumPoly** & 24 MP (3,597,600) & 30.62 & 35.00 & 33.33 & 61.67 & 26.66 \\
**SimpleHighPoly** & 4 HP (3,527,888) & 12.40 & 5.00 & 18.33 & 93.33 & 48.33 \\
**3 xHighPoly** & 12 HP (10,583,644) & 8.28 & 80.00 & 53.33 & 91.66 & 90.00 \\ \hline \multicolumn{6}{c}{**Meta Quest 3**} \\ \hline
**SimpleLowPoly** & 4 LP (99.806) & 71.52 & 4.91 & 0.00 & 0.00 & 0.00 \\
**6 xLowPoly** & 24 LP (597,648) & 71.95 & 6.55 & 0.00 & 0.00 & 0.00 \\
**12 xLowPoly** & 48 LP (1195,296) & 71.96 & 13.11 & 3.28 & 0.00 & 0.00 \\
**18 xLowPoly** & 72 LP (1,792,944) & 62.60 & 45.90 & 21.31 & 0.00 & 11.47 \\
**24 xLowPoly** & 96 LP (2,390,592) & 55.52 & 50.82 & 31.15 & 4.92 & 21.31 \\
**SimpleMediumPoly** & 4 MP (999,600) & 71.85 & 16.66 & 0.00 & 0.00 & 0.00 \\
**3 xMediumPoly** & 12 MP (1,798,800) & 52.43 & 84.51 & 67.60 & 30.03 & 19.71 \\
**6 xMediumPoly** & 24 MP (3,597,600) & 48.08 & 27.87 & 45.90 & 34.43 & 14.75 \\
**SimpleHighPoly** & 4 HP (527,888) & 15.97 & 13.11 & 83.60 & 81.97 & 40.98 \\
**3 xHighPoly** & 12 HP (10,583,644) & 10.95 & 4.92 & 91.80 & 91.80 & 57.37 \\ \hline \hline \end{tabular}
\end{table} 
Table 5: Metrics measured with the tool OVR Metrics. Scene names mean the following: (a) Simple: 4 objects, one of each model, (b) <Number>x: <Number>4 objects, <Number> of each model, (c) LowPoly/MediumPoly/HighPoly: the type of the models used in the scene. In the second column, LP = Low Poly, MP = Medium Poly, HP = High Poly.