Image Magick：在Linux服务器上花费太多时间

Question

I am facing an issue with time taken by imagemagic to execute the commands on my server. I also tried to make thread control from 20(default) to 1 but, no improvements.

Here are some of the commands we fire and time took for them on server. Is there any way to reduce this execution time?

1. /usr/bin/convert source1.jpeg -resize 4518x3013! output.png

   real 0m13.150s user 0m18.320s sys 0m2.029s

2. /usr/bin/convert output.png -crop 2408x3010+1053+0 +repage cropped.png

   real 0m5.978s user 0m5.043s sys 0m0.881s

3. /usr/bin/convert destination.png -draw image over 564,564+2408+3010 'cropped.png' output.png

   real 0m10.085s user 0m11.160s sys 0m1.710s

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Updated Information

identify -version command output:
Version: ImageMagick 6.8.9-1 Q16 x86_64 2014-08-16 http://www.imagemagick.org
Copyright: Copyright ( c ) 1999-2014 ImageMagick Studio LLC
Features: DPC OpenMP
Delegates: bzlib freetype gslib jng jpeg png ps tiff zlib

Server configuration:
OS version is centos 6
RAM 32GB

source1.jpeg( link )
First command executed with -bench 5 and returned below output.
Performance[1]: 5i 0.095ips 1.000e 90.970u 0:52.550
Performance[2]: 5i 0.104ips 0.522e 92.310u 0:48.110
Performance[3]: 5i 0.090ips 0.485e 93.420u 0:55.770
Performance[4]: 5i 0.086ips 0.474e 91.180u 0:58.230
Performance[5]: 5i 0.091ips 0.488e 94.850u 0:55.030

Thanks, Sagar

Answer 1

Does this get you any faster?

convert input.png -quality 80% -resize 4518x3013! \
    \( +clone -crop 2408x3010+1053+0 +repage \) \
    -geometry +564+564 -composite output.png

Answer 2

For really fast PNG writing, use -quality 10 for drawings, -quality 11 for photos. This should cut your PNG-writing time by a factor of five.

The "quality" number doesn't affect image quality when writing a PNG. It only affects the compression effectiveness.