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A comment on Faster Builds with Container-Based Infrastructure and Docker.

Re:Faster Builds with Container-Based Infrastructure and Docker by aseidl on Wednesday December 17, 2014 @12:11PM (#8763082)
Some rough numbers: bundle install has gone from ~50s to 3s for my Jekyll + s3_website setup. The overall build has dropped from ~120s to 45s thanks to that and using a cached version of Ruby.

One gotcha for anyone with a similar setup: make sure Jekyll's _config.yml is set to exclude/ignore the vendor directory. Oops.

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Re:Faster Builds with Container-Based Infrastructure and Docker by rb2k_ on Wednesday December 17, 2014 @06:06PM (#8764981)
Are you sure those speedups are docker related, those sound like they're bundler/caching related?

( as in http://docs.travis-ci.com/user/caching/ )

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Re:Faster Builds with Container-Based Infrastructure and Docker by aseidl on Wednesday December 17, 2014 @10:31PM (#8765848)
Correct, the speedups are directly due to bundle caching (which previously had only been available for private/paid repos). Indirectly, I would assume this caching is now implemented via Docker's use of filesystem layers.
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