NVIDIA port + X = vsync. How do I turn off vsync?

Believe it or not, I prefer to use my computer with vsync off :p not that I like tearing, but I like the slightly faster response time of the mouse and keyboard. How do I know vsync is on? I noticed some slight input delay, then I checked and all tearing is gone.

Vsync seems to have been automatically enabled when I activated the nvidia-driver port. I installed it, added nvidia_load="YES" to my blank /boot/loader.conf, added kld_list="nvidia-modeset" to /etc/rc.conf, and then added this to my blank /etc/X11/xorg.conf (which is the thing that made the driver actually work when running startx) and rebooted:

Section "Device"
        ### Available Driver options are:-
        ### Values: <i>: integer, <f>: float, <bool>: "True"/"False",
        ### <string>: "String", <freq>: "<f> Hz/kHz/MHz",
        ### <percent>: "<f>%"
        ### [arg]: arg optional
        #Option     "ShadowFB"              # [<bool>]
        #Option     "DefaultRefresh"        # [<bool>]
        #Option     "ModeSetClearScreen"     # [<bool>]
    Identifier  "Card0"
    Driver      "nvidia"
    BusID       "PCI:1:0:0"

How can I turn off vsync? Nvidia driver didn't cause global vsync to happen when I used windows and linux... so it's probably just a config thing that I'm missing, right?

I didn't have vsync before I activated nvidia driver.

Also, I am not running a compositing manager, just X and bspwm.
Alternatively, you can try exporting __GL_SYNC_TO_VBLANK=0 to your environment. Anything you can do with x11/nvidia-settings you can do without. The README that accompanies the driver package documents how.