From 0de9828e202e3225a3877e0e3c72a4b3ee04be6c Mon Sep 17 00:00:00 2001
From: Hajime Hoshi <hajimehoshi@gmail.com>
Date: Thu, 13 Jul 2017 00:18:46 +0900
Subject: [PATCH] loop: Fix FPS calculation

---
 internal/loop/run.go | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/internal/loop/run.go b/internal/loop/run.go
index e02d144d8..1e23e60e5 100644
--- a/internal/loop/run.go
+++ b/internal/loop/run.go
@@ -156,15 +156,16 @@ func (c *runContext) adjustedNowWithAudio() int64 {
 
 func (c *runContext) render(g GraphicsContext) error {
 	fps := c.fps
+	clockN := now()
 	n := c.adjustedNowWithAudio()
 	defer func() {
 		// Calc the current FPS.
-		if time.Second > time.Duration(n-c.lastFPSUpdated) {
+		if time.Second > time.Duration(clockN-c.lastFPSUpdated) {
 			return
 		}
-		currentFPS := float64(c.frames) * float64(time.Second) / float64(n-c.lastFPSUpdated)
+		currentFPS := float64(c.frames) * float64(time.Second) / float64(clockN-c.lastFPSUpdated)
 		c.updateFPS(currentFPS)
-		c.lastFPSUpdated = n
+		c.lastFPSUpdated = clockN
 		c.frames = 0
 	}()