From e17961f67e9e073c2bfe258a0d951a2012ecf4c2 Mon Sep 17 00:00:00 2001
From: Chuck <fanck0605@qq.com>
Date: Sun, 21 Feb 2021 12:27:55 +0800
Subject: [PATCH] optimize the performance of obtaining CPU temperature (#6398)
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Preformance Test (on NanoPi R2s, repeat 1000 times):

old command:

temp="$(awk "BEGIN{printf (\"%.1f\n\",$(cat /sys/class/thermal/thermal_zone0/temp)/1000) }")°C"

```
real    0m 9.20s
user    0m 3.29s
sys     0m 6.24s
```

new command:

temp="$(awk '{ printf("%.1f °C", $0 / 1000) }' /sys/class/thermal/thermal_zone0/temp)"

```
real    0m 5.57s
user    0m 1.78s
sys     0m 3.97s
```

Signed-off-by: Chuck <fanck0605@qq.com>
---
 package/lean/autocore/files/arm/sbin/cpuinfo | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/package/lean/autocore/files/arm/sbin/cpuinfo b/package/lean/autocore/files/arm/sbin/cpuinfo
index d1b697eb0..c55738b65 100755
--- a/package/lean/autocore/files/arm/sbin/cpuinfo
+++ b/package/lean/autocore/files/arm/sbin/cpuinfo
@@ -17,7 +17,7 @@ fi
 if grep -q "ipq40xx" "/etc/openwrt_release"; then
 	sys_temp="$(sensors | grep -Eo '\+[0-9]+.+C' | sed ':a;N;$!ba;s/\n/ /g;s/+//g')"
 else
-	sys_temp="$(awk "BEGIN{printf (\"%.1f\n\",$(cat /sys/class/thermal/thermal_zone0/temp)/1000) }")°C"
+	sys_temp="$(awk '{ printf("%.1f °C", $0 / 1000) }' /sys/class/thermal/thermal_zone0/temp)"
 fi
 
 echo -n "${cpu_arch} x ${cpu_cores} (${cpu_freq}, ${sys_temp})"