pulling the action image is slow

[staabm]

as can be seen in e.g. https://github.com/staabm/staabm.github.io/runs/7689001778?check_suite_focus=true pulling the ghcr.io/actions/jekyll-build-pages:v1.0.4 takes most of the time of the action to run.

I guess this is related to the number of layers this docker container has:

  /usr/bin/docker pull ghcr.io/actions/jekyll-build-pages:v1.0.4
  v1.0.4: Pulling from actions/jekyll-build-pages
  eff15d958d66: Pulling fs layer
  923e91ae3a1b: Pulling fs layer
  2aa5d3a4a151: Pulling fs layer
  bc64adf2d0b2: Pulling fs layer
  bfc5cca7d80e: Pulling fs layer
  61b6e3e25463: Pulling fs layer
  7c62fb63f605: Pulling fs layer
  0f68cc81f8f6: Pulling fs layer
  09f325326117: Pulling fs layer
  a73a0a50c4db: Pulling fs layer
  bc64adf2d0b2: Waiting
  bfc5cca7d80e: Waiting
  61b6e3e25463: Waiting
  7c62fb63f605: Waiting
  0f68cc81f8f6: Waiting
  09f325326117: Waiting
  a73a0a50c4db: Waiting
  2aa5d3a4a151: Verifying Checksum
  2aa5d3a4a151: Download complete
  923e91ae3a1b: Verifying Checksum
  923e91ae3a1b: Download complete
  eff15d958d66: Verifying Checksum
  eff15d958d66: Download complete
  bfc5cca7d80e: Verifying Checksum
  bfc5cca7d80e: Download complete
  bc64adf2d0b2: Verifying Checksum
  bc64adf2d0b2: Download complete
  7c62fb63f605: Verifying Checksum
  7c62fb63f605: Download complete
  09f325326117: Verifying Checksum
  09f325326117: Download complete
  0f68cc81f8f6: Verifying Checksum
  0f68cc81f8f6: Download complete
  a73a0a50c4db: Verifying Checksum
  a73a0a50c4db: Download complete
  61b6e3e25463: Verifying Checksum
  61b6e3e25463: Download complete
  eff15d958d66: Pull complete
  923e91ae3a1b: Pull complete
  2aa5d3a4a151: Pull complete
  bc64adf2d0b2: Pull complete
  bfc5cca7d80e: Pull complete
  61b6e3e25463: Pull complete
  7c62fb63f605: Pull complete
  0f68cc81f8f6: Pull complete
  09f325326117: Pull complete
  a73a0a50c4db: Pull complete
  Digest: sha256:e56d7e4c5ac45aa2934b1d535f4c66769a442ef6538c7948f8b4e3b2950fd7b4
  Status: Downloaded newer image for ghcr.io/actions/jekyll-build-pages:v1.0.4
  ghcr.io/actions/jekyll-build-pages:v1.0.4

would it be possible to reduce the numer of layers to speedup the built?

[yoannchaudet]

Reducing the layers would not speed up the pull of the image. And any changes we make means we would break the potential caching of top layers.

You could give a try at https://github.blog/changelog/2022-07-27-github-pages-custom-github-actions-workflows-beta/ and use especially this starter workflow which does not rely on Docker. Instead it pulls the gems at build time and leverage cache.