I compiled the Multi Proxy Sample of Delphi and Lazarus.
I found a great difference in fps calculation.
Multi Proxy Sample
Compiled with Delphi 10.2 : around 1600 fps
Compiled with Lazarus 1.8RC1 : around 75 fps
Why fps are so different?
System: Windows 10 64 bits; Video: NVIDIA Quadro 2000;
CPU: QuadCore Intel Xeon W3550, 3200 MHz; RAM: 32 GB
GLScene vertion 1.5.0