mouse.m

#import <Cocoa/Cocoa.h>
#import <ApplicationServices/ApplicationServices.h>

CGEventTimestamp lastTimestamp = 0;

CGEventRef eventTapCallback(CGEventTapProxy proxy, CGEventType type, CGEventRef event, void *refcon) {
    if (type == kCGEventMouseMoved) {
        CGPoint location = CGEventGetLocation(event);
        NSLog(@"Mouse moved to: x = %.2f, y = %.2f", location.x, location.y);
        CGEventTimestamp currentTimestamp = CGEventGetTimestamp(event);


       if (lastTimestamp != 0) {
            // Calculate time delta in milliseconds
            double timeDelta = (currentTimestamp - lastTimestamp) / 1.0e6;  // Convert nanoseconds to milliseconds
            NSLog(@"Time delta: %.3f ms | Mouse moved to: x = %.2f, y = %.2f", timeDelta, location.x, location.y);
        } else {
            NSLog(@"Mouse moved to: x = %.2f, y = %.2f", location.x, location.y);
        }

       lastTimestamp = currentTimestamp;
    }
    return event;
}

int main(int argc, const char * argv[]) {
    @autoreleasepool {
        NSLog(@"Starting mouse move logger...");

        CGEventMask eventMask = CGEventMaskBit(kCGEventMouseMoved);
        CFMachPortRef eventTap = CGEventTapCreate(kCGSessionEventTap, kCGHeadInsertEventTap, 0, eventMask, eventTapCallback, NULL);

        if (!eventTap) {
            NSLog(@"Failed to create event tap.");
            return 1;
        }

        CFRunLoopSourceRef runLoopSource = CFMachPortCreateRunLoopSource(kCFAllocatorDefault, eventTap, 0);
        CFRunLoopAddSource(CFRunLoopGetCurrent(), runLoopSource, kCFRunLoopCommonModes);
        CGEventTapEnable(eventTap, true);

        [[NSRunLoop currentRunLoop] run];
    }
    return 0;
}

Build with

clang -framework Foundation -framework CoreGraphics mouse.m