Hi all, I am currently wondering why I have a big difference in performance between 2 Mesa drivers: egl_glx and egl_gallium. I have already posted a mesasge 2 weeks ago on the mesa user list, but I did not receive any answer. Please find below my previous mail I am currently working on an ARM processor without graphical acceleration (based on A5 without any GPU and neon instruction). I used Open Embedded to build the distribution for my board, and therefore Mesa was compiled with the whole system for the ARM board. I made some test performance using egl_gears to find the best configuration of the EGL library. I am surprised by the difference between egl_glx and egl_gallium driver. I was expecting that the egl_gallium driver will be faster that the egl_glx driver. The egl_glx driver is around 9-10 times faster than egl_gallium. Can someone explain me what could be the difference? Did I mistake a Mesa configuration option? I try to use egl_gallium, since it is the only on driver that support FBDev Linux device, and we use FBDev has Linux driver. For information, here is my configure command line configure --build=x86_64-linux --host=arm-ing-linux-gnueabi --target=arm-ing-linux-gnueabi --prefix=/usr --exec_prefix=/usr --bindir=/usr/bin --sbindir=/usr/sbin --libexecdir=/usr/libexec --datadir=/usr/share --sysconfdir=/etc --sharedstatedir=/com --localstatedir=/var --libdir=/usr/lib --includedir=/usr/include --oldincludedir=/usr/include --infodir=/usr/share/info --mandir=/usr/share/man --disable-silent-rules --disable-dependency-tracking --disable-glu --disable-glw --disable-glut --enable-shared-glapi --enable-gallium-egl --with-gallium-drivers --enable-dri --with-dri-drivers=swrast --enable-gles1 --enable-gles2 --with-x --enable-glx --enable-gbm --enable-egl --with-egl-platforms=fbdev,x11 --enable-glx-tls PS: I am not an OpenGL expert, more a integrator for the system Thanks in advance for all help/information than you can provide to me. Best Regards, Yannick