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    • Peter Putz's avatar
      Add optional compression -z · 7df47ed6
      Peter Putz authored and Jonah Brüchert's avatar Jonah Brüchert committed
      Normally we just `adb push` the `.img` files. With this option we first compress the images on the host machine, then push and finally decompress on the device. The time to push goes down significantly and we spend a little extra time for de-/compression.
      
      It could be that this trade off is device specific. I played with a few compression tools. `pigz` seemed to provide the best total time for me. On my setup the total time for `flash_img()` goes from from ca 14:12 to 5:42
      
      Without compression
      ```
      .halium-install-imgs.dYogm/rootfs.img: 1 file pushed. 3.8 MB/s (3221225472 bytes in 812.863s)
      .halium-install-imgs.dYogm/system.img: 1 file pushed. 3.7 MB/s (151584768 bytes in 38.899s)
      
      real	14m11,792s
      user	0m0,674s
      sys	0m4,238s
      ```
      
      With compression
      ```
      .halium-install-imgs.Pw6FU/rootfs.img.gz: 1 file pushed. 3.8 MB/s (649476288 bytes in 161.334s)
      .halium-install-imgs.Pw6FU/system.img.gz: 1 file pushed. 3.9 MB/s (78788455 bytes in 19.298s)
      
      real	5m41,985s
      user	2m16,681s
      sys	0m6,789s
      ```
      7df47ed6
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