移除所有的 .git 

find . -name ".git" -exec rm -rf {} \; 

//--- acer i7 sabre430.110jb 3378 seconds 

59G 

rm out -> 45G 

rm repo k.git u.git -> 11G 

//--- 

acer i7 vm_u14.04 buffalo GDU3 imx6 adrd422_100 5055 seconds 20170207 

acer i7 vm_u14.04 usb3 imx6 adrd601_100 5878 seconds 20170117 

acer i7 vm_u14.04 usb3 imx6 adrd601_210 20170119 

6347 seconds

6135 seconds

acer i5 vm_u14.04 usb3 imx6 adrd442_100 20170119

10303 seconds

//---

sabre 601.210

org -> 74G

rm out/ -> 52G

rm .repo -> 17G

rm .git -> 16G

//--- 

sabre 422jb

org -> 49G 

rm out/ -> 30G 

rm .repo/ ->9.4G 

rm .git/ ->8.1G 

//---

//--- 

~/bin/repo init -u https://android.googlesource.com/platform/manifest -b android-6.0.1_r22 git checkout m6.0.1_2.1.0-ga 

source /opt/android_M6.0.1_2.1.0_source/code/M6.0.1_2.1.0/and_patch.sh 

c_patch /opt/android_M6.0.1_2.1.0_source/code/M6.0.1_2.1.0/ imx_M6.0.1_2.1.0

6347 seconds