Function capture_metrics 

pub fn capture_metrics() -> PerfMetrics

Capture current performance metrics from the CVKG core.

Reads frame timing, scene graph statistics, and GPU memory usage from the running application. When not connected to a live runtime, returns default (zero) values.

Examples

use cvkg_cli::devtools::capture_metrics;
let metrics = capture_metrics();
// Default metrics should have zero values
assert_eq!(metrics.fps, 0.0);
assert_eq!(metrics.node_count, 0);