[Bug 1966238] Re: progress during dpkg-deb build

[Balint Reczey]

By a quick glance zstd _compression_ is still single threaded. Switching
it to be multi-threaded may help with the timeout. I planned doing that
(with the kernel builds in mind) and the idea was switching
decompress_zstd() in dpkg to use the zstd command instead of libzstd's
API.

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https://bugs.launchpad.net/bugs/1966238

Title:
  progress during dpkg-deb build

Status in dpkg package in Ubuntu:
  New

Bug description:
  It would be nice to receive progress during long dpkg-deb -c time.

  Specifically, we have dbgsym builds of kenrels that are 6GB+ in size
  and take more time to compress than builder timeouts.

  If dpkg-deb were to produce output during such long compression times,
  it would have been very nice.

  I'm thinking something along the lines of piping temp compression
  files through pv for regular output. Or something of the sort.

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