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I've found that tar processing tends to dominate the time used to do anything with standard OCI layers. I have a more efficient format (that splits apart the layer into metadata+chunks) that I'm open sourcing soon if y'all are interested in using it.

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interested. is the split for dedup, parallel pulls, or lazy loading specific files? maybe all.

we've played with some chunking ideas on our end but haven't landed on a format. drop a link when it's out.

All of the above, plus being able to reflink to skip copies of large files, plus not having to round trip from disk a few times for tar layers, plus a number of other side benefits. Only using lazy loading for buildkit right now, as it does require FUSE and I want it to be opt in (for robotics contexts, for instance, you never want to lazy load).

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