model test add tps

tests/test_qwen2_5vl.rs

@@ -45,9 +45,15 @@ fn qwen2_5vl_generate() -> Result<()> {
     println!("Time elapsed in load model is: {:?}", i_duration);
 
     let i_start = Instant::now();
-    let result = model.generate(mes)?;
-    println!("generate: \n {:?}", result);
+    let result = model.generate(mes)?;    
     let i_duration = i_start.elapsed();
+    println!("generate: \n {:?}", result);
+    if result.usage.is_some() {
+        let num_token = result.usage.as_ref().unwrap().total_tokens;
+        let duration_secs = i_duration.as_secs_f64();
+        let tps = num_token as f64 / duration_secs;
+        println!("Tokens per second (TPS): {:.2}", tps);
+    }
     println!("Time elapsed in generate is: {:?}", i_duration);
 
     Ok(())