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Date: Wed, 20 Nov 2019 12:31:45 +0200
From: Adrian Bunk <bunk@stusta.de>
To: Stefan Agner <stefan@agner.ch>
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Cc: openembedded-core@lists.openembedded.org
Subject: Re: [PATCH v4 2/2] image_types: add Zstandard conversion support
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On Wed, Nov 20, 2019 at 09:12:58AM +0000, Stefan Agner wrote:
>...
> --- a/meta/classes/image_types.bbclass
> +++ b/meta/classes/image_types.bbclass
> @@ -59,6 +59,8 @@ XZ_INTEGRITY_CHECK ?= "crc32"
>  
>  ZIP_COMPRESSION_LEVEL ?= "-9"
>  
> +ZSTD_COMPRESSION_LEVEL ?= "-3"
> +
>...

Why -3 and not -19 ?

Compression speed is not a real issue, and AFAIR decompression
tends to be slightly faster with smaller compressed size.
Plus the benefit that smaller images are faster to load
from network/storage.

cu
Adrian