1 files changed, 8 insertions, 0 deletions

diff --git a/camera.go b/camera.go
index 8ca0664..5eefad5 100644
--- a/camera.go
+++ b/camera.go
@@ -4,6 +4,7 @@ import (
   "fmt"
   maths "math"
   "os"
+  "time"
 )
 
 type Camera struct {
@@ -68,6 +69,8 @@ func NewCamera(wi uint, ar float64,
 }
 
 func (cam Camera) Render(world Hittable) {
+  start := time.Now();
+
   fmt.Printf("P3\n%d %d\n255\n", cam.ImageWidth, cam.ImageHeight);
   for row := uint(0); row < cam.ImageHeight; row++ {
     fmt.Fprintf(os.Stderr,
@@ -85,6 +88,11 @@ func (cam Camera) Render(world Hittable) {
     }
     fmt.Printf("\n");
   }
+
+  dur := time.Since(start);
+  fmt.Fprintf(os.Stderr,
+              "Done, in %5.2f seconds!    \n",
+              dur.Seconds());
 }
 
 func (cam Camera) GetRay(row uint, col uint) Ray {